A - HO I CNG - HO V CPhn lp 10 1-Cu to nguyn t-nh lut tun hon- Lin kt ho hc Cu 1: Trong 20 nguyn t u tin ca bng tun hon cc nguyn t ho hc, s nguyn t c nguyn t vi hai electron c thn trng thi c bn l A. 1. B. 3. C. 2. D. 4. Cu 2: Cho cc nguyn t: X(Z = 19); Y(Z = 37); R(Z = 20); T(Z = 12). Dy cc nguyn t sp xp theo chiu tnh kim loi tng dn t tri sang phi: A. T, X, R, Y. B. T, R, X, Y. C. Y, X, R, T. D. Y, R, X, T Cu 3: Cho cc nguyn t M (Z =11), X (Z = 8), Y (Z = 9), R (Z = 12). Bn knh ion M+, X2 , Y , R2+ c sp xp theo th t tng dn t tri sang phi l A. M+, Y , R2+, X2 B. R2+, M+, Y , X2 C. X2 , Y , M+, R2+ D. R2+, M+, X2 , Y Cu 4: Dy no sau y xp theo chiu tng dn bn knh ca cc ion? A. Al3+ , Mg2+, Na+ , F , O2 . B. Na+, O2 , Al3+ , F , Mg2+. C. O2 , F , Na+, Mg2+, Al3+. D. F , Na+, O2 , Mg2+, Al3+. Cu 5: Nguyn t ca nguyn t R c tng s ht c bn (proton, ntron, electron) l 52; trong tng s ht khng mang in gp 1,059 ln ht mang in dng. R l A. 35Cl . B. 37Cl . C. 27 Al . D. 35 K Cu 6: Nguyn t ca mt nguyn t X c tng s ht c bn (proton, ntron, electron) l 82, bit s ht mang in nhiu hn s ht khng mang in l 22. K hiu nguyn t ca X l 55 57 A. 57 Ni B. 27 Co C. 56 Fe D. 26Fe. 28 26 Cu 7: Tng s ht (proton, ntron, electron) trong ion M3+ l 37. V tr ca M trong bng tun hon l: A. chu k 3, nhm IIIA B. chu k 4, nhm IA C. chu k 3, nhm VIA D. chu k 3, nhm IIA Cu 8: Tng s ht proton, ntron, electron trong 2 nguyn t kim loi X v Y l 142, trong tng s ht mang in nhiu hn tng s ht khng mang in l 42. S ht mang in ca nguyn t Y nhiu hn ca X l 12. Kim loi Y l (Cho bit s hiu nguyn t: Ca (Z = 20), Cr (Z = 24), Fe (Z = 26), Zn (Z = 30)). A. Ca. B. Fe. C. Cr. D. Zn. Cu 9: Mt oxit c cng thc X2O trong tng s ht (proton, ntron v electron) ca phn t l 92, trong s ht mang in nhiu hn s ht khng mang in l 28. Cng thc oxit l (Cho nguyn t khi ca oxi bng 16). A. Na2O. B. K2O. C. Li2O. D. N2O. Cu 10: Cho X, Y, Z l ba nguyn t lin tip nhau trong mt chu k ca bng tun hon cc nguyn t ho hc. Tng s cc ht mang in trong thnh phn cu to nguyn t ca X, Y, Z bng 72. Pht biu no sau y khng ng ? A. Cc ion X+ , Y2+, Z3+ c cng cu hnh electron 1s22s22p6. B. Bn knh cc nguyn t gim: X > Y > Z. C. Bn knh cc ion tng: X+ < Y2+ < Z3+ . 1

D. Bn knh cc ion gim: X+ > Y2+ > Z3+ . Cu 11: Cho X, Y, Z, R, T l nm nguyn t lin tip nhau trong bng tun hon cc nguyn t ho hc c tng s in tch ht nhn l 90 (X c s in tch ht nhn nh nht). Pht biu no sau y khng ng khi ni v cc ht (nguyn t v ion) ? A. Cc ht X2 , Y , Z , R+ , T2+ c cng cu hnh electron 1s22s22p63s23p6. B. Bn knh cc ht gim: X2 > Y > Z > R+ > T2+ . C. m in ca Y nh hn m in ca R. D. Trong phn ng oxi ho - kh, X2 v Y ch c kh nng th hin tnh kh. Cu 12: Mt nguyn t X c tng s electron cc phn lp p l 10. Nguyn t X thuc loi A. nguyn t s. B. nguyn t p. C. nguyn t d. D. nguyn t f. Cu 13: Hai nguyn t X v Y ng k tip nhau trong mt chu k c tng s ht mang in trong hai ht nhn l 25. V tr ca X v Y trong bng tun hon l A. Chu k 3 v cc nhm IA v IIA. B. Chu k 2 v cc nhm IA v IIA. C. Chu k 3 v cc nhm IIIA v IVA. D. Chu k 3 v cc nhm IIA v IIIA. Cu 14: Pht biu no sau y ng? Khi nguyn t nhng electron tr thnh ion c A. in tch dng v c nhiu proton hn. B. in tch dng v s proton khng i C. in tch m v s proton khng i. D. in tch m v c nhiu proton hn. Cu 15: Cu so snh tnh cht ca nguyn t kali vi nguyn t canxi no sau y l ng? So vi nguyn t canxi, nguyn t kali c A. bn knh ln hn v m in ln hn. B. bn knh ln hn v m in nh hn. C. bn knh nh hn v m in nh hn. D. bn knh nh hn v m in ln hn. Cu 16: X l nguyn t trong nguyn t c tng s electron bng 6. Y l nguyn t ho hc c in tch ht nhn l 17+. Hp cht to bi X, Y c cng thc v c loi lin kt ho hc l A. XY2 , lin kt cng ho tr. B. X2Y , lin kt cng ho tr. C. XY , lin kt cng ho tr. D. XY4 , lin kt cng ho tr. Cu 17: X, R, Y l nhng nguyn t ho hc c s n v in tch ht nhn tng ng l 9, 19, 8. Cng thc v loi lin kt ho hc c th c gia cc cp X v R, R v Y, X v Y l A. RX, lin kt cng ho tr. B. R2Y , lin kt cng ho tr. C. YX2 , lin kt cng ho tr. D. Y2X , lin kt cng ho tr. Cu 18: Hp cht M c dng XY3, tng s ht proton trong phn t l 40. Trong thnh phn ht nhn ca X cng nh Y u c s ht proton bng s ht ntron. X thuc chu k 3 bng tun hon cc nguyn t ho hc. Cng thc phn t ca M l A. AlF3. B. AlCl3. C. SO3. D. PH3. 2 tng s proton tng s nguyn t

(Gi : Xc nh s proton trung bnh Z = < 10 < ZY . Cc nguyn t thuc chu k 2 v s khi:9 7 3 Li , 4 Be

= 10 ZY

,

11 5B

,

12 16 14 19 6C , 7 N , 8O , 9F

, 20 Ne , chn nguyn t ca nguyn t c s khi 10

chn). Cu 19: Nguyn t X khng phi l kh him, nguyn t c phn lp electron ngoi cng l 3p. Nguyn t ca nguyn t Y c phn lp electron ngoi cng l 3s. Tng s electron hai phn lp ngoi cng ca X v Y l 7. in tch ht nhn ca X v Y l: A. X(18+) ; Y(10+). B. X(13+) ; Y(15+). C. X(12+) ; Y(16+). D. X(17+) ; Y(12+). Cu 20: Nguyn t X (nguyn t p) khng phi l kh him, nguyn t c phn lp electron ngoi cng l 4p. Nguyn t ca nguyn t Y (nguyn t s) c phn lp electron ngoi cng l 4s. Bit tng s electron ca hai phn lp ngoi cng ca X v Y bng 7. Cu hnh electron ca X v Y ln lt l A. [Ar]3d104s24p5 ; [Ar]3d64s2. B. [Ar]3d104s24p5 ; 2 [Ar]4s . C. [Ar]3d104s24p6 ; [Ar]4s1. D. [Ar]3d104s24p5 ; [Ar]3d104s2. Cu 21: Hp cht M c to nn t cation X+ v anion Yn. Mi ion u do 5 nguyn t to nn. Tng s proton trong X+ bng 11, cn tng s electron trong Yn l 50. Bit rng hai nguyn t trong Yn cng nhm A v thuc hai chu k lin tip trong bng tun hon cc nguyn t ho hc. Cng thc phn t ca M l A. (NH4)2SO4 B. NH4HCO3 C. (NH4)3PO4 D. NH4HSO3 Cu 22: Trong t nhin bc c hai ng v bn l 107Ag v 109Ag. Nguyn t khi trung bnh ca Ag l 107,87. Phn trm khi lng ca 107Ag c trong AgNO3 l A. 35,56%. B. 43,12%. C. 35,59%. D. 64,44%. 35 37 Cu 23: Trong t nhin, nguyn t clo c hai ng v bn l 17 Cl v 17 Cl , trong35 37 ng v 17 Cl chim 75,77% v s nguyn t. Phn trm khi lng ca 17 Cl trong CaCl2 l A. 26,16%. B. 24,23%. C. 16,16%. D. 47,80%. 63 65 Cu 24: Trong t nhin, nguyn t ng c hai ng v l 29 Cu v 29 Cu ,

trong ng v63 29 Cu

65 29 Cu

chim 27% v s nguyn t. Phn trm khi lng ca

trong Cu2O l A. 88,82%. B. 73%. C. 32,15%. D. 64,29%. 63 63 (Gi : Tnh A Cu , M Cu 2 O , khi lng 29 Cu trong 1 mol Cu2O, % 29 Cu ). 1 2 Cu 25: Cho hai ng v ca hiro l 1 H (k hiu l H) v 1 H (k hiu l D). Mt lt kh hiro giu teri ( 2 H ) iu kin tiu chun nng 0,10 g. 1 Phn trm s phn t ng v D2 ca hiro l (coi hn hp kh gm H2 , D2) A. 2,0%. B. 12,0%. C. 12,1%. D. 12,4% aM1 + bM 2 (Gii: Biu thc tnh: M = ; a + b = 100 b = (100 - a). 100 3

Cu 26: Nguyn t X c 2 electron ho tr v nguyn t Y c 5 electron ho tr. Cng thc ca hp cht to bi X v Y c th l: A. X2Y3. B. X3Y2. C. X2Y5. D. X5Y2. Cu 27: Nguyn t X l phi kim c ho tr cao nht vi oxi l a; ho tr trong hp cht kh vi hiro l b. Quan h gia a v b l: A. a = b. B. a + b = 8. C. a b. D. a b = 8. Cu 28: Cho m in ca cc nguyn t Na: 0,93 ; Li: 0,98 ; Mg: 1,31 ; Al: 1,61. P: 2,19 ; S : 2,58 ; Br: 2,96; N: 3,04. Dy cc hp cht trong phn t c lin kt ion l: A. MgBr2, Na3P B. Na2S, MgS C. Na3N, AlN D. LiBr, NaBr thi i hc 26 55 26 1.(KA-2010)-Cu 25: Nhn inh nao sau y ung khi noi v 3 nguyn t : 13 X, 26 Y, 12 Z ? A. X, Y thuc cung mt nguyn t hoa hoc B. X va Z co cung s khi C. X va Y co cung s ntron D. X, Z la 2 ng vi cua cung mt nguyn t hoa hoc 2.(KA-08)-Cu 21: Bn knh nguyn t ca cc nguyn t: 3Li, 8O, 9F, 11Na c xp theo th t tng dn t tri sang phi l A. Li, Na, O, F. B. F, O, Li, Na. C. F, Li, O, Na. D. F, Na, O, Li. 3.(KB-09)-Cu 5: Cho cc nguyn t: K (Z = 19), N (Z = 7), Si (Z = 14), Mg (Z = 12). Dy gm cc nguyn t c sp xp theo chiu gim dn bn knh nguyn t t tri sang phi l: A. N, Si, Mg, K. B. Mg, K, Si, N. C. K, Mg, N, Si. D. K, Mg, Si, N 4.(KB-08)-Cu 2: Dy cc nguyn t sp xp theo chiu tng dn tnh phi kim t tri sang phi l: A. P, N, F, O. B. N, P, F, O. C. P, N, O, F. D. N, P, O, F. 5.(KA-2010)-Cu 30: Cac nguyn t t Li n F, theo chiu tng cua in tich hat nhn thi A. Ban kinh nguyn t va m in u tng B. Ban kinh nguyn t tng, m in giam C. Ban kinh nguyn t giam, m in tng D. Ban kinh nguyn t va m in u giam 6.(KB-07)-Cu 42: Trong mt nhm A, tr nhm VIIIA, theo chiu tng ca in tch ht nhn nguyn t th A. tnh kim loi tng dn, bn knh nguyn t gim dn. B. tnh kim loi tng dn, m in tng dn. C. m in gim dn, tnh phi kim tng dn. D. tnh phi kim gim dn, bn knh nguyn t tng dn. 7.(C-2010)-Cu 17 : Phat biu nao sau y ung ? A. Dung dich NaF phan ng vi dung dich AgNO3 sinh ra AgF kt tua B. Iot co ban kinh nguyn t ln hn brom C. Axit HBr co tinh axit yu hn axit HCl D. Flo co tinh oxi hoa yu hn clo 8.(C-07)-Cu 16: Cho cc nguyn t M (Z = 11), X (Z = 17), Y (Z = 9) v R (Z = 19). m in ca cc nguyn t tng dn theo th t A. M < X < Y < R. B. R < M < X < Y. C. Y < M < X < R. D. M < X < R < Y. 9.(C-2010)-Cu 20 : Cac kim loai X, Y, Z co cu hinh electron nguyn t ln lt la: 1s22s22p63s1; 1s22s22p63s2; 1s22s22p63s23p1. Day gm cac kim loai xp theo chiu tng dn tinh kh t trai sang phai la A. X, Y, Z B. Z, X, Y C. Z, Y, X D. Y, Z, X + 10.(KA-07)-Cu 5: Dy gm cc ion X , Y v nguyn t Z u c cu hnh electron 1s22s22p6 l: A. Na+, Cl , Ar. B. Li+, F , Ne. C. Na+, F , Ne. D. K+, Cl , Ar. 2+ 2 6 11.(KA-07)-Cu 8: Anion X v cation Y u c cu hnh electron lp ngoi cng l 3s 3p . 4

V tr ca cc nguyn t trong bng tun hon cc nguyn t ha hc l: A. X c s th t 17, chu k 4, nhm VIIA; Y c s th t 20, chu k 4, nhm IIA. B. X c s th t 18, chu k 3, nhm VIA; Y c s th t 20, chu k 4, nhm IIA. C. X c s th t 17, chu k 3, nhm VIIA; Y c s th t 20, chu k 4, nhm IIA. D. X c s th t 18, chu k 3, nhm VIIA; Y c s th t 20, chu k 3, nhm IIA. 12.(KA-09)-Cu 40: Cu hnh electron ca ion X2+ l 1s22s22p63s23p63d6. Trong bng tun hon cc nguyn t ha hc, nguyn t X thuc A. chu k 4, nhm VIIIB. B. chu k 4, nhm VIIIA. C. chu k 3, nhm VIB. D. chu k 4, nhm IIA. 13.(C-09)-Cu 36: Mt nguyn t ca nguyn t X c tng s ht proton, ntron, electron l 52 v c s khi l 35. S hiu nguyn t ca nguyn t X l A. 15 B. 17 C. 23 D. 18 14.(KB-2010)-Cu 12: Mt ion M3+ c tng s ht proton, ntron, electron l 79, trong s ht mang in nhiu hn s ht khng mang in l 19. Cu hnh electron ca nguyn t M l A. [Ar]3d54s1. B. [Ar]3d64s2. C. [Ar]3d64s1. D. [Ar]3d34s2. 15.(KB-07)-Cu 6: Trong hp cht ion XY (X l kim loi, Y l phi kim), s electron ca cation bng s electron ca anion v tng s electron trong XY l 20. Bit trong mi hp cht, Y ch c mt mc oxi ha duy nht. Cng thc XY l A. LiF. B. NaF. C. AlN. D. MgO. 16.(C-08)-Cu 40: Nguyn t ca nguyn t X c tng s ht electron trong cc phn lp p l 7. S ht mang in ca mt nguyn t Y nhiu hn s ht mang in ca mt nguyn t X l 8 ht. Cc nguyn t X v Y ln lt l (bit s hiu nguyn t: Na=11;Al=13;P=15;Cl=7; Fe = 26) A. Fe v Cl. B. Na v Cl. C. Al v Cl. D. Al v P. 17.(C-09)-Cu 15 : Nguyn t ca nguyn t X c electron mc nng lng cao nht l 3p. Nguyn t ca nguyn t Y cng c electron mc nng lng 3p v c mt electron lp ngoi cng. Nguyn t X v Y c s electron hn km nhau l 2. Nguyn t X, Y ln lt l A. kh him v kim loi B. kim loi v kim loi C. kim loi v kh him D. phi kim v kim loi 18.(KB-08)-Cu 36: Cng thc phn t ca hp cht kh to bi nguyn t R v hiro l RH3. Trong oxit m R c ho tr cao nht th oxi chim 74,07% v khi lng. Nguyn t R l A. S. B. As. C. N. D. P. 19.(KA-09)-Cu 33: Nguyn t ca nguyn t X c cu hnh electron lp ngoi cng l ns 2np4. Trong hp cht kh ca nguyn t X vi hiro, X chim 94,12% khi lng. Phn trm khi lng ca nguyn t X trong oxit cao nht l A. 27,27%. B. 40,00%. C. 60,00%. D. 50,00%. 63 20.(C-07)-Cu 24: Trong t nhin, nguyn t ng c hai ng v l 29 Cu v 65 29 Cu . Nguyn t khi trung bnh ca ng l 63,546. Thnh phn phn trm 63 tng s nguyn t ca ng v 29 Cu l A. 27%. B. 50%. C. 54%. D. 73%. 21.(KB-09)-Cu 40: Pht biu no sau y l ng? A. Nc thuc loi tinh th phn t. B. th rn, NaCl tn ti di dng tinh th phn t. C. Photpho trng c cu trc tinh th nguyn t. D. Kim cng c cu trc tinh th phn t. 22.(C-2010)-Cu 14 : Lin kt hoa hoc gia cac nguyn t trong phn t H2O la lin kt A. cng hoa tri khng phn cc B. hiro C. ion D. cng hoa tri phn cc 23.(C-09)-Cu 12 : Dy gm cc cht trong phn t ch c lin kt cng ho tr phn cc l A. O2, H2O, NH3 B. H2O, HF, H2S C. HCl, O3, H2S D. HF, Cl2, H2O 24.(KA-08)-Cu 30: Hp cht trong phn t c lin kt ion l A. HCl. B. NH3. C. H2O. D. NH4Cl. 2 2 6 2 6 1 25.(C-08)-Cu 26: Nguyn t ca nguyn t X c cu hnh electron 1s 2s 2p 3s 3p 4s , nguyn 5

t ca nguyn t Y c cu hnh electron 1s 2s 2p . Lin kt ho hc gia nguyn t X v nguyn t Y thuc loi lin kt A. kim loi. B. cng ho tr. C. ion. D. cho nhn. 26.(KB-2010)-Cu 11: Cc cht m phn t khng phn cc l: A. HBr, CO2, CH4. B. Cl2, CO2, C2H2. C. NH3, Br2, C2H4. D. HCl, C2H2, Br2. 2-Phn ng oxi ho kh Cu 1: C cc pht biu sau: Qu trnh oxi ho l (1) qu trnh lm gim s oxi ho ca nguyn t. (2) qu trnh lm tng s oxi ho ca nguyn t. (3) qu trnh nhng electron. (4) qu trnh nhn electron. Pht biu ng l A. (1) v (3). B. (1) v (4). C. (3) v (4). D. (2) v (3). Cu 2: Phn ng no di y khng l phn ng oxi ho-kh ? A. Zn + H2SO4 ZnSO4 + H2 B. Fe(NO3)3 + 3NaOH Fe(OH)3 + 3NaNO3 C. Zn + 2Fe(NO3)3 Zn(NO3)2 + 2Fe(NO3)2 D. 2Fe(NO3)3 + 2KI 2Fe(NO3)2 + I2 + 2KNO3 Cu 3: Cho s phn ng: C2H4 C2H6 C2H5Cl C2H5OH CH3CHO CH3COOH CH3COOC2H5 C bao nhiu phn ng trong s chuyn ho trn thuc phn ng oxi ho kh ? A. 3 B. 5 C. 6 D. 4 (Gi : Xc nh s oxi ho ca cacbon trong cc nhm chc). Cu 4: Cho phn ng: Fe(NO3)2 + AgNO3 Fe(NO3)3 + Ag Pht biu no sau y l ng ? A. Fe2+ c tnh oxi ho mnh hn Fe3+. B. Fe3+ c tnh oxi ho + mnh hn Ag . C. Ag c tnh kh mnh hn Fe2+. D. Fe2+ kh c Ag+. Cu 5: Cho phn ng nX + mYn+ nX m+ + mY (a) C cc pht biu sau: phn ng (a) xy ra theo chiu thun (1) Xm+ c tnh oxi ho mnh hn Yn+. (2) Yn+ c tnh oxi ho mnh hn Xm+. (3) Y c tnh kh yu hn X. (4) Y c tnh kh mnh hn X. Pht biu ng l A. (1) v (2). B. (2) v (3). C. (3) v (4). D. (1) v (3). Cu 6: Cho cc phn ng: Fe + Cu2+ Fe2+ + Cu (1) ; 2Fe2+ + Cl2 2Fe3+ + 2Cl (2); 2Fe3+ + Cu 2Fe2+ + Cu2+ (3). Dy cc cht v ion no sau y c xp theo chiu gim dn tnh oxi ho: A. Cu2+ > Fe2+ > Cl2 > Fe3+ B. Cl2 > Cu2+ > Fe2+ > Fe3+ . 3+ 2+ 2+ C Cl2 > Fe > Cu > Fe D. Fe3+ > Cl2 > Cu2+ > Fe2+Cu 7: Cho s phn ng sau: Cu + HNO3 Cu(NO3)2 + NO + H2O Sau khi lp phng trnh ho hc ca phn ng, s nguyn t Cu b oxi ho v s phn t HNO3 b kh l A. 1 v 6. B. 3 v 6. C. 3 v 2. D. 3 v 8.(a) (b) (c) (d) (e) (f)

2

2

5

Cu 8: Trong phng trnh phn ng: 6

aK2SO3 + bKMnO4 + cKHSO4 dK2SO4 + eMnSO4 + gH2O (cc h s a, b, c... l nhng s nguyn, ti gin). Tng h s cc cht tham gia phn ng l A. 13. B. 10. C. 15. D. 18. Cu 9: Trong phng trnh phn ng: aK2SO3 + bK2Cr2O7 + cKHSO4 dK2SO4 + eCr2(SO4)3 + gH2O (cc h s a, b, c... l nhng s nguyn, ti gin). Tng h s cc cht tham gia phn ng l A. 13. B. 12. C. 25. D. 18. Cu 10: Trong phn ng: Al + HNO3 (long) Al(NO3)3 + N2O + H2O, t l gia s nguyn t Al b oxi ho v s phn t HNO3 b kh (cc s nguyn, ti gin) l A. 8 v 30. B. 4 v 15. C. 8 v 6. D. 4 v 3. Cu 11: Cho phng trnh ion sau: Zn + NO3 + OH ZnO22 + NH3 + H2O Tng cc h s (cc s nguyn ti gin) ca cc cht tham gia v to thnh sau phn ng l A. 19. B. 23. C. 18. D. 12. (hoc: Cho phng trnh ion sau: Zn + NO3 + OH + H2O [Zn(OH)4]2 + NH3 Tng cc h s (cc s nguyn ti gin) ca cc cht tham gia v to thnh sau phn ng l A. 23. B. 19. C. 18. D. 12). Cu 12: Cho s phn ng: CH2=CH2 + KMnO4 + H2SO4 (COOH)2 + MnSO4 + K2SO4 + H2O T l v h s gia cht kh v cht oxi ho tng ng l: A. 5 : 2. B. 2 : 5. C. 2 : 1. D. 1 : 2. Cu 13: Cho s phn ng: (COONa)2 + KMnO4 + H2SO4 CO2 + MnSO4 + Na2SO4 + K2SO4 + H2O Tng h s ca cc cht (l nhng s nguyn, ti gin) trong phng trnh phn ng l A. 39. B. 40. C. 41. D. 42. thi i hc 1.(KA-07)-Cu 15: Cho cc phn ng sau: a) FeO + HNO3 (c, nng) b) FeS + H2SO4 (c, nng) c) Al2O3 + HNO3 (c, nng) d) Cu + dung dch FeCl3 e) CH3CHO + H2 f) glucoz + AgNO3 (hoc Ag2O) trong dung dch NH3 g) C2H4 + Br2 h) glixerol (glixerin) + Cu(OH)2 Dy gm cc phn ng u thuc loi phn ng oxi ha - kh l: A. a, b, d, e, f, h. B. a, b, d, e, f, g. C. a, b, c, d, e, h. D. a, b, c, d, e, g. 2.(KB-08)-Cu 19: Cho cc phn ng: Ca(OH)2 + Cl2 CaOCl2 + H2O 2H2S + SO2 3S + 2H2O t0 2NO2 + 2NaOH NaNO3 + NaNO2 + H2O 4KClO3 KCl + 3KClO4 O3 O2 + O. S phn ng oxi ho kh l A. 5. B. 2. C. 3. D. 4. 3.(KA-07)-Cu 22: Cho tng cht: Fe, FeO, Fe(OH)2, Fe(OH)3, Fe3O4, Fe2O3, Fe(NO3)2, Fe(NO3)3, 7

FeSO4, Fe2(SO4)3, FeCO3 ln lt phn ng vi HNO3 c, nng. S phn ng thuc loi phn ng oxi ho - kh l A. 8. B. 5. C. 7. D. 6. 4.(KB-2010)-Cu 25: Cho dung dich X cha KMnO4 va H2SO4 (loang) ln lt vao cac dung dich: FeCl2, FeSO4, CuSO4, MgSO4, H2S, HCl (c). S trng hp co xay ra phan ng oxi hoa- kh la A. 3 B. 5 C. 4 D. 6 5.(KA-2010)-Cu 5: Thc hin cac thi nghim sau : (I) Suc khi SO2 vao dung dich KMnO4 (II) Suc khi SO2 vao dung dich H2S (III) Suc hn hp khi NO2 va O2 vao nc (IV) Cho MnO2 vao dung dich HCl c, nong (V) Cho Fe2O3 vao dung dich H2SO4 c, nong (VI) Cho SiO2 vao dung dich HF S thi nghim co phan ng oxi hoa - kh xay ra la A. 3 B. 6 C. 5 D. 4 6.(KA-08)-Cu 32: Cho cc phn ng sau: 4HCl + MnO2 MnCl2 + Cl2 + 2H2O. 2HCl + Fe FeCl2 + H2. 14HCl + K2Cr2O7 2KCl + 2CrCl3 + 3Cl2 + 7H2O. 6HCl + 2Al 2AlCl3 + 3H2. 16HCl + 2KMnO4 2KCl + 2MnCl2 + 5Cl2 + 8H2O. S phn ng trong HCl th hin tnh oxi ha l A. 2. B. 1. C. 4. D. 3. 7.(KB-09)-Cu 23: Cho cc phn ng sau : (a) 4HCl + PbO2 PbCl2 + Cl2 + 2H2O (b) HCl + NH4HCO3 NH4Cl + CO2 + H2O (c) 2HCl + 2HNO3 2NO2 + Cl2 + 2H2O (d) 2HCl + Zn ZnCl2 + H2 S phn ng trong HCl th hin tnh kh l A. 2 B. 4 C. 1 D. 3 + 2+ 2+ 3+ 2+ 2 8.(KB-08)-Cu 13: Cho dy cc cht v ion: Cl2, F2, SO2, Na , Ca , Fe , Al , Mn , S , Cl . S cht v ion trong dy u c tnh oxi ho v tnh kh l A. 3. B. 4. C. 6. D. 5. 9.(KA-09)-Cu 29: Cho dy cc cht v ion: Zn, S, FeO, SO2, N2, HCl, Cu2+, Cl . S cht v ion c c tnh oxi ha v tnh kh l A. 4. B. 6. C. 5. D. 7. 10.(C-09)-Cu 22 : Trong cc cht : FeCl2, FeCl3, Fe(NO3)2, Fe(OH)3, FeSO4, Fe2O3, Fe3O4. S cht c c tnh oxi ho v tnh kh l A. 5 B. 4 C. 2 D. 3 11.(C-2010)-Cu 25 : Nguyn t S ong vai tro va la cht kh, va la cht oxi hoa trong phan ng nao sau y? t0 A. 4S + 6NaOH(c) 2Na2S + Na2S2O3 + 3H2O t B. S + 3F2 SF6 t0 C. S + 6HNO3 (c) H2SO4 + 6NO2 + 2H2O t0 D. S + 2Na Na2S 12.(KB-2010)-Cu 19: Cho phn ng: 2C6H5-CHO + KOH C6H5-COOK + C6H5-CH2-OH Phn ng ny chng t C6H5-CHO A. va th hin tnh oxi ha, va th hin tnh kh. B. ch th hin tnh oxi ha. C. ch th hin tnh kh. D. khng th hin tnh kh v tnh oxi ha. (Gi : Xc nh s oxi ho ca cacbon trong nhm chc? R-CH3; R-CH2Cl; R-CH2OH; R-CHO; R-COOH; RCOOK). 13.(KB-07)-Cu 25: Khi cho Cu tc dng vi dung dch cha H2SO4 long v NaNO3, vai tr ca NaNO3 trong phn ng l A. cht xc tc. B. mi trng. C. cht oxi ho. D. cht kh.0

8

14.(C-07)-Cu 3: SO2 lun th hin tnh kh trong cc phn ng vi A. H2S, O2, nc Br2. B. dung dch NaOH, O2, dung dch KMnO4. C. dung dch KOH, CaO, nc Br2. D. O2, nc Br2, dung dch KMnO4. 15.(KA-08)-Cu 15: Khi in phn NaCl nng chy (in cc tr), ti catt xy ra + + A. s kh ion Na . B. s kh ion Cl . C. s oxi ho ion Cl . D. s oxi ho ion Na . 16. (C-08)-Cu 35: Cho phn ng ha hc: Fe + CuSO4 FeSO4 + Cu. Trong phn ng trn xy ra 2+ 2+ 2+ A. s kh Fe v s oxi ha Cu. B. s kh Fe v s kh Cu . 2+ C. s oxi ha Fe v s oxi ha Cu. D. s oxi ha Fe v s kh Cu . 17.(KB-07)-Cu 27: Trong phn ng t chy CuFeS2 to ra sn phm CuO, Fe2O3 v SO2 th mt phn t CuFeS2 s A. nhng 12 electron. B. nhn 13 electron. C. nhn 12 electron. D. nhng 13 electron. 18.(KA-07)-Cu 30: Tng h s (cc s nguyn, ti gin) ca tt c cc cht trong phng trnh phn ng gia Cu vi dung dch HNO3 c, nng l A. 10. B. 11. C. 20. D. 19. 19.(KA-09)-Cu 15: Cho phng trnh ha hc: Fe3O4 + HNO3 Fe(NO3)3 + NxOy + H2O Sau khi cn bng phng trnh ha hc trn vi h s ca cc cht l nhng s nguyn, ti gin th h s ca HNO3 l A. 46x 18y. B. 45x 18y. C. 13x 9y. D. 23x 9y. 20.(C-2010)-Cu 29 : Cho phn ng Na2SO3 + KMnO4 + NaHSO4 Na2SO4 + MnSO4 + K2SO4 + H2O Tng h s ca cc cht (l nhng s nguyn, ti gin) trong phng trnh phn ng l A. 23 B. 27 C. 47 D. 31 21.(KA-2010)-Cu 45: Trong phn ng: K2Cr2O7 + HCl CrCl3 + Cl2 + KCl + H2O S phn t HCl ng vai tr cht kh bng k ln tng s phn t HCl tham gia phn ng. Gi tr ca k l A. 4/7. B. 1/7. C. 3/14. D. 3/7. 22.(KB-08)-Cu 1: Cho bit cc phn ng xy ra sau: 2FeBr2 + Br2 2FeBr3 2NaBr + Cl2 2NaCl + Br2 Pht biu ng l: A. Tnh kh ca Cl mnh hn ca Br . B. Tnh oxi ha ca Br2 mnh hn ca Cl2. 2+ C. Tnh kh ca Br mnh hn ca Fe . D. Tnh oxi ha ca Cl2 mnh hn ca Fe3+. 23.(C-08)-Cu 24: Cho dy cc cht: FeO, Fe(OH)2, FeSO4, Fe3O4, Fe2(SO4)3, Fe2O3. S cht trong dy b oxi ha khi tc dng vi dung dch HNO3 c, nng l A. 3. B. 5. C. 4 D. 6. 24.(C-08)-*Cu 52: Hai kim loi X, Y v cc dung dch mui clorua ca chng c cc phn ng ha hc sau: X + 2YCl3 XCl2 + 2YCl2; Y + XCl2 YCl2 + X. Pht biu ng l: 2+ 2+ A. Ion Y c tnh oxi ha mnh hn ion X . 2+ B. Kim loi X kh c ion Y . C. Kim loi X c tnh kh mnh hn kim loi Y. 3+ 2+ D. Ion Y c tnh oxi ha mnh hn ion X . 25.(KB-07)-Cu 11: Cho cc phn ng xy ra sau y: (1) AgNO3 + Fe(NO3)2 Fe(NO3)3 + Ag (2) Mn + 2HCl MnCl2 + H2 Dy cc ion c sp xp theo chiu tng dn tnh oxi ho l 2+ + 3+ + + 2+ + 3+ A. Mn , H , Fe , Ag . B. Ag , Mn , H , Fe . 2+ + 3+ + 3+ + 2+ C. Mn , H , Ag+, Fe . D. Ag , Fe , H , Mn . 26.(KA-2010)Cu 14: Nung nong tng cp cht trong binh kin: (1) Fe + S (r), (2) Fe2O3 + CO (k), (3) Au + O2 (k), (4) Cu + Cu(NO3)2 (r), (5) Cu + KNO3 (r) , (6) Al + NaCl (r). 9

Cac trng hp xay ra phan ng oxi hoa kim loai la : A. (1), (3), (6) B. (2), (3), (4) C. (1), (4), (5) D. (2), (5), (6) 27.(KB-08)-Cu 47: Cho cc phn ng: t0 (1) O3 + dung dch KI (2) F2 + H2O t0 (3) MnO2 + HCl c (4) Cl2 + dung dch H2S Cc phn ng to ra n cht l : A. (1), (2), (3). B. (1), (3), (4). C. (2), (3), (4). D. (1), (2), (4). 28.(KB-07)-*Cu 51: Cho occ phn ng: o (1) Cu2O + Cu2S ot t

(2) Cu(NO3)2 ot

t

(3) CuO + CO (4) CuO + NH3 S phn ng to ra kim loi Cu l A. 3. B. 1. C. 2. D. 4. 29.(KA-07)-Cu 16: Khi nung hn hp cc cht Fe(NO3)2, Fe(OH)3 v FeCO3 trong khng kh n khi lng khng i, thu c mt cht rn l A. Fe3O4. B. FeO. C. Fe. D. Fe2O3. 30.(C-08)-Cu 47: Cp cht khng xy ra phn ng ho hc l A. Cu + dung dch FeCl3. B. Fe + dung dch HCl. C. Fe + dung dch FeCl3. D. Cu + dung dch FeCl2. 31.(C-08)-Cu 5: oTrng hp khng xy ra phn ng ha hc l t A. 3O2 + 2H2S 2H2O + 2SO2. B. FeCl2 + H2S FeS + 2HCl. C. O3 + 2KI + H2O 2KOH + I2 + O2. D. Cl2 + 2NaOH NaCl + NaClO + H2O. 3-Xc nh sn phm ca s kh hay s oxi ho Cu 1: Ha tan hon ton 13,92 gam Fe3O4 trong dung dch HNO3 d, thu c 448 ml kh X ( ktc). Kh X l A. N2 B. N2O C. NO D. NO2 Ha tan hon ton 11,2 gam Fe vo HNO3 d, thu c dung dch Y v 6,72 lt hn hp Cu 2: kh B gm NO v mt kh X, vi t l th tch l 1 : 1. Kh X l A. N2 B. N2O C. N2O5 D. NO2 Cu 3: Cho 9,6 gam Mg tc dng vi axit sunfuric m c, thy c 49 gam H2SO4 tham gia phn ng, sn phm to thnh l MgSO4, H2O v sn phm kh X. Sn phm kh X l A. SO2 . B. S. C. H2S. D. SO2 v H2S. Cu 4: Cho 5,2 gam Zn tc dng va 200ml axit HNO3 1M thu c Zn(NO3)2, H2O v sn phm kh duy nht l kh X. Sn phm kh X l A. NO2 . B. N2O. C. NO. D. N2. Cu 5: Mt hn hp X gm 0,04 mol Al v 0,06 mol Mg. Nu em hn hp X ho tan hon ton trong HNO3 c nng thu c 0,03 mol sn phm Y do s kh ca N+5. Nu em hn hp X ho tan trong H2SO4 c nng thu c 0,12 mol sn phm Z do s kh ca S+6. Y v Z ln lt l A. N2O v H2S B. NO2 v SO2 C. N2O v SO2 D. NH4NO3 v H2S. Cu 6: Ho tan hon ton hn hp M gm 0,07 mol Mg v 0,005 mol MgO vo dung dch HNO3 d thu c 0,224 lt kh X (ktc) v dung dch Y. C cn cn thn Y thu c 11,5 gam mui khan. X l A. NO. B. N2. C. N2O. D. NO2.

10

Cu 7: Oxi ho kh amoniac bng 0,5 mol kh oxi trong iu kin thch hp, thu c 0,4 mol sn phm oxi ho duy nht c cha nit. Sn phm cha nit l A. N2. B. N2O. C. NO. D. NO2. Cu 8: Oxi ho H2S trong iu kin thch hp cn dng ht 4,48 lt kh oxi ( ktc), thu c 0,4 mol sn phm oxi ho duy nht c cha lu hunh. Khi lng sn phm cha lu hunh l A. 25,6 gam. B. 12,8 gam. C. 13,6 gam. D. 39,2 gam. thi i hc 1.(KB-07)-Cu 46: Cho 0,01 mol mt hp cht ca st tc dng ht vi H2SO4 c nng (d), thot ra 0,112 lt ( ktc) kh SO2 (l sn phm kh duy nht). Cng thc ca hp cht st l A. FeO B. FeS2. C. FeS. D. FeCO3. 2.(C-08)-Cu 43: Cho 3,6 gam Mg tc dng ht vi dung dch HNO3 (d), sinh ra 2,24 lt kh X (sn phm kh duy nht, ktc). Kh X l A. N2O. B. NO2. C. N2. D. NO. 3.(C-09)-Cu 45 : Ho tan hon ton mt lng bt Zn vo mt dung dch axit X. Sau phn ng thu c dung dch Y v kh Z. Nh t t dung dch NaOH (d) vo Y, un nng thu c kh khng mu T. Axit X l A. H2SO4 c B. H3PO4 C. H2SO4 long D. HNO3 4.(C-2010)-Cu 2 : Cho hn hp gm 6,72 gam Mg va 0,8 gam MgO tac dung ht vi lng d dung dich HNO3. Sau khi cac phan ng xay ra hoan toan, thu c 0,896 lit mt khi X (ktc) va dung dich Y. Lam bay hi dung dich Y thu c 46 gam mui khan. Khi X la A. NO2 B. N2O C. NO D. N2 5.(KB-08)-Cu 16 : Cho 2,16 gam Mg tc dng vi dung dch HNO3 (d). Sau khi phn ng xy ra hon ton thu c 0,896 lt kh NO ( ktc) v dung dch X. Khi lng mui khan thu c khi lm bay hi dung dch X l A. 8,88 gam. B. 13,92 gam. C. 6,52 gam. D. 13,32 gam. 4-Nhm halogen, hp cht. Oxi Lu hunh, hp cht. Cu 1: Dy cc ion halogenua sp xp theo chiu tnh kh tng dn t tri sang phi: A. F , Br , Cl , I . B. Cl , F , Br , I . C. I , Br , Cl , F . D. F , Cl , Br , I . Cu 2: Cho cc cht tham gia phn ng: a) S + F2 b) SO2 + H2S c) SO2 + O2 d) S + H2SO4 (c, nng) e) H2S + Cl2 (d) + H2O f) SO2 + + Br2 + H2O S phn ng to ra sn phm m lu hunh c s oxi ho +6 l A. 2. B. 3. C. 4. D. 5. Cu 3: Cho hn hp cc kh N2, Cl2, SO2, CO2, O2 sc t t qua dung dch NaOH d th hn hp kh cn li l A. N2, Cl2, O2. B. Cl2, O2, SO2. C. N2, Cl2, CO2, O2. D. N2, O2. Cu 4: Hn hp gm NaCl v NaBr. Cho hn hp tc dng vi dung dch AgNO3 d th to ra kt ta c khi lng bng khi lng ca AgNO3 tham gia phn ng. Thnh phn % theo khi lng ca NaCl trong hn hp u l: A. 27,84%. B. 15,2%. C. 13,4%. D. 24,5%. Cu 5: Nung hn hp bt KClO3, KMnO4, Zn mt thi gian. Ly hn hp sn phm rn cho vo dung dch H2SO4 long th thu c hn hp kh. Hn hp l A. Cl2 v O2. B. H2, Cl2 v O2. C. Cl2 v H2. D. O2 v H2. Cu 6: Cho hn hp kh Cl2, NO2 vo dung dch NaOH d thu c dung dch cha hai mui. Hai mui trong dung dch thu c l 11

A. NaCl, NaNO2 B. NaCl v NaNO3 C. NaNO2, NaClO D. NaClO v NaNO3. Cu 7: t hn hp bt st v iot (d) thu c A. FeI2. B. FeI3. C. hn hp FeI2 v FeI3. D. khng phn ng. Cu 8: C dung dch X gm (KI v mt t h tinh bt). Cho ln lt tng cht sau: NaBr, O3, Cl2, H2O2, FeCl3, AgNO3 tc dng vi dung dch X. S cht lm dung dch X chuyn sang mu xanh l A. 4 cht B. 6 cht C. 5 cht D. 3 cht Cu 9: Cho s phn ng:o t NaX (r) + H2SO4 () NaHSO4 + HX (X l gc axit). Phn ng trn dng iu ch cc axit: A. HF, HCl, HBr. B. HBr, HI, HF. C. HNO3, HBr, HI. D. HNO3, HCl, HF. Cu 10: Hin tng no xy ra khi sc kh Cl2 (d) vo dung dch cha ng thi H2S v BaCl2 ? A. C kt ta mu trng xut hin. B. C kh hiro bay ln. C. Cl2 b hp th v khng c hin tng g. D. C kt ta mu en xut hin. Cu 11: Hin tng no xy ra khi sc kh H2S vo dung dch cha ng thi BaCl2 v Ba(ClO)2 (d)? A. C kh clo bay ln. B. C kt ta mu trng xut hin. C. H2S b hp th v khng c hin tng g. D. C kt ta mu en xut hin. Cu 12: Trong phng th nghim, kh clo c iu ch bng cch cho axit clohiric c tc dng vi mangan ioxit hoc kali pemanganat thng b ln tp cht l kh hiro clorua v hi nc. loi b tp cht cn dn kh clo ln lt qua cc bnh ra kh cha: A. dung dch NaOH v dung dch H2SO4 c. B. dung dch NaCl v dung dch H2SO4 c. C. dung dch NaHCO3 v dung dch H2SO4 c. D. dung dch H2SO4 c v dung dch NaCl. Cu 13: Trong phng th nghim, kh CO2 c iu ch bng cch cho CaCO3 tc dng vi dung dch HCl thng b ln kh hiro clorua v hi nc. thu c kh CO2 gn nh tinh khit ngi ta dn hn hp kh ln lt qua hai bnh ng cc dung dch no trong cc dung dch di y? A. NaOH (d), H2SO4 c. B. NaHCO3 (d), H2SO4 c. C. Na2CO3 (d), NaCl. D. H2SO4 c, Na2CO3 (d). Cu 14: Trong phng th nghim ngi ta iu ch H2S bng cch cho FeS tc dng vi: A. dung dch HCl B. dung dch H2SO4 c nng C. dung dch HNO3 D. nc ct Cu 15: Phn ng ho hc no sau y c s dng trong phng th nghim iu ch kh SO2? A. 4FeS2 + 11O2 2Fe2O3 + 8SO2 B. S + O2 SO2 C. Na2SO3 + H2SO4 Na2SO4 + SO2 + H2O D. Na2SO3 + 2HCl 2NaCl + SO2 + H2O Cu 16: Khi ly 14,25g mui clorua ca mt kim loi M ch c ho tr II v mt lng mui nitrat ca M vi s mol nh nhau, th thy khi lng khc nhau l 7,95g. Cng thc ca hai mui l: A. CuCl2, Cu(NO3)2 B. FeCl2, Fe(NO3)2 C. MgCl2, Mg(NO3)2 D. CaCl2, Ca(NO3)2 12

Cu 17: Np kh oxi vo bnh c dung tch 2,24 lt ( 0OC, 10 atm). Thc hin phn ng ozon ho bng tia h quang in, sau a bnh v nhit ban u th p sut l 9,5 atm. Hiu sut ca phn ng ozon ho l A. 10%. B. 5%. C. 15%. D. 20%. Cu 18: Phng in qua O2 c hn hp kh c M = 33 gam. Hiu sut ca phn ng ozon ho l A. 7,09%. B. 9,09%. C. 11,09%. D. 13,09%. Cu 19: Hn hp X gm O2 v O3 c t khi so vi hiro l 19,2. Hn hp Y gm H2 v CO. Th tch kh X ( ktc) cn dng t chy hon ton 3 mol kh Y l A. 28 lt B. 22,4 lt C. 16,8 lt D. 9,318 lt Cu 20: Kh 4,8 gam hn hp CuO v mt oxit st c t l s mol 1 : 1 bng kh CO (d). Sau phn ng thu c 3,52 gam cht rn X. Ho tan X vo dung dch HCl d thy thot ra 0,896 lt kh ( ktc) (cc phn ng xy ra hon ton). Cng thc st oxit l: A. FeO. B. Fe2O3. C. Fe3O4. D. FeO2. Cu 21: Oxit ca mt kim loi c cha 40% oxi v khi lng. Trong sunfua ca kim loi th lu hunh chim phn trm theo khi lng l: A. 80%. B. 57,14% C. 43,27% D. 20% Cu 22: Cho 11,3 gam hn hp hai kim loi Mg v Zn tc dng vi 125 ml dung dch gm H2SO4 2M v HCl 2M thu c 6,72 lt kh ( ktc). C cn dung dch sau phn ng, khi lng mui khan thu c l A. 36,975 gam. B. 38,850 gam. C. 39,350 gam. D. 36,350 gam. (Gi : d axit, axit H2SO4 kh bay hi, axit HCl d bay hi). thi i hc 1.(KA-2010)-Cu 39: Pht biu khng ng l: A. Hiro sunfua b oxi ha bi nc clo nhit thng. B. Kim cng, than ch, fuleren l cc dng th hnh ca cacbon. C. Tt c cc nguyn t halogen u c cc s oxi ha: -1, +1, +3, +5 v +7 trong cc hp cht. D. Trong cng nghip, photpho c sn xut bng cch nung hn hp qung photphorit, ct v than cc 12000C trong l in. 2.(KB-08)-*Cu 53: Hi thu ngn rt c, bi vy khi lm v nhit k thu ngn th cht bt c dng rc ln thu ngn ri gom li l A. vi sng. B. ct. C. mui n. D. lu hunh. 3.(KA-09)-Cu 14: Dy gm cc cht u tc dng c vi dung dch HCl long l A. AgNO3, (NH4)2CO3, CuS. B. Mg(HCO3)2, HCOONa, CuO. C. FeS, BaSO4, KOH. D. KNO3, CaCO3, Fe(OH)3. 4.(C-07)-Cu 26: C th dng NaOH ( th rn) lm kh cc cht kh A. NH3, SO2, CO, Cl2. B. N2, NO2, CO2, CH4, H2. C. NH3, O2, N2, CH4, H2. D. N2, Cl2, O2 , CO2, H2. 5.(C-09)-Cu 24 : Cht kh X tan trong nc to ra mt dung dch lm chuyn mu qu tm thnh v c th c dng lm cht ty mu. Kh X l A. NH3 B. O3 C. SO2 D. CO2 6.(KB-09)-Cu 2: C cc th nghim sau: (I) Nhng thanh st vo dung dch H2SO4 long, ngui. (II) Sc kh SO2 vo nc brom. (III) Sc kh CO2 vo nc Gia-ven. (IV) Nhng l nhm vo dung dch H2SO4 c, ngui. S th nghim xy ra phn ng ha hc l A. 4. B. 3. C. 1. D. 2. 13

7.(C-07)-Cu 38: Cc kh c th cng tn ti trong mt hn hp l A. NH3 v HCl. B. H2S v Cl2. C. Cl2 v O2. D. HI v O3. 8.(KA-2010)-Cu 12: Hn hp khi nao sau y khng tn tai nhit thng ? A. H2 va F2 B. Cl2 va O2 C. H2S va N2 D. CO va O2 9.(KA-07)-Cu 43: Trong phng th nghim, ngi ta thng iu ch clo bng cch A. in phn nng chy NaCl. B. cho dung dch HCl c tc dng vi MnO2, un nng. C. in phn dung dch NaCl c mng ngn. D. cho F2 y Cl2 ra khi dung dch NaCl. 10.(KA-08)-Cu 7: Trong phng th nghim, ngi ta iu ch oxi bng cch A. nhit phn KClO3 c xc tc MnO2. B. nhit phn Cu(NO3)2. C. in phn nc. D. chng ct phn on khng kh lng. 11.(KB-09)-Cu 45: ng dng no sau y khng phi ca ozon? A. Cha su rng B. Ty trng tinh bt, du n C. iu ch oxi trong phng th nghim D. St trng nc sinh hot 12.(KA-2010)-Cu 41: Cht c dng ty trng giy v bt giy trong cng nghip l A. CO2. B. SO2. C. N2O. D. NO2. 13.(KA-09)-Cu 20: Nu cho 1 mol mi cht: CaOCl2, KMnO4, K2Cr2O7, MnO2 ln lt phn ng vi lng d dung dch HCl c, cht to ra lng kh Cl2 nhiu nht l A. KMnO4. B. K2Cr2O7. C. CaOCl2. D. MnO2. 14.(KB-09)-Cu 33: Khi nhit phn hon ton 100 gam mi cht sau : KClO3 (xc tc MnO2), KMnO4, KNO3 v AgNO3. Cht to ra lng O2 ln nht l A. KNO3 B. AgNO3 C. KMnO4 D. KClO3 15.(KB-09)-Cu 8: Khi nhit phn hon ton tng mui X, Y th u to ra s mol kh nh hn s mol mui tng ng. t mt lng nh tinh th Y trn n kh khng mu, thy ngn la c mu vng. Hai mui X, Y ln lt l : A. KMnO4, NaNO3. B. Cu(NO3)2, NaNO3. C. CaCO3, NaNO3. D. NaNO3, KNO3. o 16.(KB-07)-Cu 2: Cho 13,44 lt kh clo ( ktc) i qua 2,5 lt dung dch KOH 100 C. Sau khi phn ng xy ra hon ton, thu c 37,25 gam KCl. Dung dch KOH trn c nng l A. 0,24M. B. 0,48M. C. 0,2M. D. 0,4M. 17.(KB-2009)-Cu 11: Cho dung dch cha 6,03 gam hn hp gm hai mui NaX v NaY (X, Y l hai nguyn t c trong t nhin, hai chu k lin tip thuc nhm VIIA, s hiu nguyn t ZX < ZY) vo dung dch AgNO3 (d), thu c 8,61 gam kt ta. Phn trm khi lng ca NaX trong hn hp ban u l A. 58,2%. B. 52,8%. C. 41,8%. D. 47,2%. 18.(C-2010)-Cu 12: Cho dung dich cha 9,125 gam mui hirocacbonat phan ng ht vi dung dich H2SO4 (d), thu c dung dich cha 7,5 gam mui sunfat trung hoa. Cng thc cua mui hirocacbonat la A. NaHCO3 B. Mg(HCO3)2 C. Ba(HCO3)2 D. Ca(HCO3)2 19.(KB-08)-Cu 24: Cho 1,9 gam hn hp mui cacbonat v hirocacbonat ca kim loi kim M tc dng ht vi dung dch HCl (d), sinh ra 0,448 lt kh ( ktc). Kim loi M l A. Na. B. K. C. Rb. D. Li.

14

5- Dung dch - Nng dung dch - Bi tp p dng nh lut bo ton vt cht (bo ton khi lng v bo ton electron) Cu 1: Ho tan m gam SO3 vo 180 gam dung dch H2SO4 20% thu c dung dch H2SO4 32,5%. Gi tr m l A. 33,3. B. 25,0. C. 12,5. D. 32,0 Cu 2: Mt loi oleum c cng thc H2SO4. nSO3. Ly 3,38 g oleum ni trn pha thnh 100ml dung dch X. trung ho 50ml dung dch X cn dng va 100ml dung dch NaOH 0,4M. Gi tr ca n l: A. 1. B. 2. C. 3. D. 4. Cu 3: Cho dung dch axit axetic c nng x% tc dng va vi dung dch NaOH 10%, thu c dung dch mui c nng 10,25%. x c gi tr A. 20%. B. 16%. C. 15%. D. 13%. Cu 4: Ho tan mt mui cacbonat ca kim loi M, ho tr n bng mt lng va dung dch H2SO4 9,8%, thu c dung dch mui sunfat trung ho 14,18%. Kim loi M l A. Cu. B. Na. C. Ca. D. Fe. Cu 5: Cho 24,4 gam hn hp Na2CO3, K2CO3 tc dng va vi dung dch BaCl2. Sau phn ng thu c 39,4 gam kt ta. Lc tch kt ta, c cn dung dch, thu c m gam mui clorua khan. Gi tr ca m l A. 2,66. B. 22,6. C. 6,26 . D. 26,6. Cu 6: Ho tan hon ton 23,8 gam hn hp mt mui cacbonat ca cc kim loi ho tr (I) v mui cacbonat ca kim loi ho tr (II) trong dung dch HCl d. Sau phn ng thu c 4,48 lt kh (ktc). em c cn dung dch thu c bao nhiu gam mui khan? A. 13,0 gam. B. 15,0 gam. C. 26,0 gam. D. 30,0 gam. Cu 7: Ho tan ht m gam hn hp gm M2CO3 v RCO3 trong dung dch HCl d thu c dung dch Y v V lt kh CO2 (ktc). C cn dung dch Y th c (m + 3,3) gam mui khan. Gi tr ca V l A. 2,24 B. 3,36 D. 4,48 D. 6,72 Cu 8: Ha tan hon ton m gam hn hp X gm Al, Fe, Zn bng dung dch HCl d. Dung dch thu c sau phn ng tng ln so vi ban u (m 2) gam. Khi lng (gam) mui clorua to thnh trong dung dch l A. m + 71. B. m + 35,5. C. m + 73. D. m + 36,5. Cu 9: Ho tan hon ton 16 gam hn hp Mg v Fe bng dung dch H2SO4 long va . Sau phn ng thy khi lng dung dch tng thm 15,2 gam so vi ban u. Khi lng mui khan thu c khi c cn dung dch sau phn ng l (cho H = 1; O = 16; Mg = 24; S = 32; Fe = 56) A. 53,6 gam. B. 54,4 gam. C. 92 gam D. 92,8 gam. Cu 10: m gam kim loi kim X trong khng kh thu c 6,2 gam oxit. Ha tan ton b lng oxit trong nc c dung dch Y. trung ha dung dch Y cn va 100 ml dung dch H 2SO4 1M. Kim loi X l : A. Li B. Na C. K D. Cs Cu 11: Cho 20 gam kim loi M v Al vo dung dch hn hp H2SO4 v HCl (s mol HCl gp 3 ln s mol H2SO4) thu c 11,2 lt kh H2 ( ktc) v cn d 3,4 gam kim loi. Lc ly dung dch, c cn thu c m gam mui khan. Gi tr ca m l A. 57,1 B. 75,1 C. 51,7 D. 71,5. 15

Cu 12: Ho tan hon ton 2,05 gam hn hp X gm cc kim loi Al, Mg, Zn vo mt lng va dung dch HCl. Sau phn ng, thu c 1,232 lt kh ( ktc) v dung dch Y. C cn dung dch Y, khi lng mui khan thu c l A. 4,320g. B. 5,955g. C. 6,245g. D. 6,480g. Cu 13: t chy hon ton 33,4 gam hn hp X gm bt cc kim loi Al, Fe v Cu ngoi khng kh, thu c 41,4 gam hn hp Y gm 3 oxit. Cho ton b hn hp Y tc dng hon ton vi dung dch H2SO4 20% c khi lng ring d = 1,14 g/ml. Th tch ti thiu ca dung dch H2SO4 20% ho tan ht hn hp Y l: (cho H = 1, O = 16, S = 32) A. 300 ml. B. 175 ml. C. 200 ml. D. 215 ml. Cu 14: Cho 2 gam hn hp X gm Mg, Al, Zn, Fe tc dng vi dung dch HCl d gii phng 1,12 lt kh (ktc). Mt khc, cng cho 2 gam X tc dng ht vi kh clo d thu c 5,763 gam hn hp mui. Thnh phn phn trm khi lng Fe trong X l A. 14%. B. 16,8%. C. 19,2%. D. 22,4%. Cu 15: Cho 40 gam hn hp vng, bc, ng, st, km tc dng vi oxi d nung nng thu c 46,4 gam cht rn X. Th tch dung dch HCl 2M va phn ng ht vi cht rn X l A. 400 ml. B. 600 ml. C. 800 ml. D. 500 ml. Cu 16: Hn hp X gm hai kim loi Mg v Zn. Dung dch Y l dung dch HCl nng x mol/lt. Th nghim 1: Cho m g hn hp X vo 2 lt dung dch Y th thot ra 8,96 lt H2 ( ktc). Th nghim 2: Cho m g hn hp X vo 3 lt dung dch Y th thot ra 11,2 lt H2 ( ktc). Gi tr ca x l (mol/lt) A. 0,2 . B. 0,8. C. 0,4 . D. 1,0. (hoc cho m = 24,3 gam, tnh khi lng mi kim loi trong 24,3 gam hn hp u). Cu 17: Cho hn hp X gm MgO v Al2O3. Chia X thnh hai phn hon ton u nhau, mi phn c khi lng m gam. Cho phn 1 tc dng vi 200ml dung dch HCl, un nng v khuy u. Sau khi kt thc phn ng, lm bay hi cn thn hn hp thu c (m + 27,5) gam cht rn khan. Cho phn 2 tc dng vi 400ml dung dch HCl dng th nghim trn, un nng, khuy u v sau khi kt thc phn ng cng li lm bay hi hn hp nh trn v cui cng thu c (m+30,8) gam cht rn khan. Nng mol/l ca dung dch HCl dng l A. 1,0 . B. 0,5. C. 5,0 . D. 2,5. (hoc cho m = 19,88 gam, tnh khi lng mi oxit kim loi trong m gam hn hp u). Cu 18: Cho 16,2 gam kim loi M (ho tr khng i) tc dung vi 0,15 mol O2. Ho tan cht rn sau phn ng bng dung dch HCl d thy bay ra 13,44 lt H2 (ktc). Kim loi M l A. Ca. B. Mg. C. Al. D. Zn. Cu 19: Chia m gam hn hp hai kim loi c ho tr khng i lm hai phn bng nhau. Phn 1 ho tan ht trong dung dch HCl to ra 1,792 lt H2 ( ktc). Phn 2 nung trong oxi d thu c 2,84 gam hn hp oxit. Gi tr ca m l A. 1,8. B. 2,4. C. 1,56. D. 3,12. Cu 20: Cho 3,04 gam hn hp X gm FeO, Fe3O4, Fe2O3. kh hon ton hn hp X th cn 0,1 gam hiro. Mt khc, ho tan hn hp X trong H2SO4 c, 16

nng th th tch kh SO2 (l sn phm kh duy nht ktc) l (cho H = 1; O = 16; Fe = 56) A. 112 ml. B. 224 ml. C. 336 ml. D. 448 ml. thi i hc 1.(C-2010)-Cu 36 : Cho 0,015 mol mt loi hp cht oleum vo nc thu c 200 ml dung dch X. trung ho 100 ml dung dch X cn dng 200 ml dung dch NaOH 0,15M. Phn trm v khi lng ca nguyn t lu hunh trong oleum trn l A. 37,86% B. 35,95% C. 23,97% D. 32,65% 2.(KA-09)-Cu 19: Cho 3,68 gam hn hp gm Al v Zn tc dng vi mt lng va dung dch H2SO4 10% thu c 2,24 lt kh H2 ( ktc). Khi lng dung dch thu c sau phn ng l A. 101,48 gam. B. 101,68 gam. C. 97,80 gam. D. 88,20 gam. 3.(KA-2010)-Cu 33: Ha tan hon ton 8,94 gam hn hp gm Na, K v Ba vo nc, thu c dung dch X v 2,688 lt kh H2 (ktc). Dung dch Y gm HCl v H2SO4, t l mol tng ng l 4 : 1. Trung ha dung dch X bi dung dch Y, tng khi lng cc mui c to ra l A. 13,70 gam. B. 18,46 gam. C. 12,78 gam. D. 14,62 gam. 4.(KA-07)-Cu 45: Ho tan hon ton 2,81 gam hn hp gm Fe2O3, MgO, ZnO trong 500 ml axit H2SO4 0,1M (va ). Sau phn ng, hn hp mui sunfat khan thu c khi c cn dung dch c khi lng l (cho H = 1, O = 16, Mg = 24, S = 32, Fe = 56, Zn = 65) A. 6,81 gam. B. 4,81 gam. C. 3,81 gam. D. 5,81 gam. 5.(C-07)-Cu 18 : Cho mt mu hp kim Na-Ba tc dng vi nc (d), thu c dung dch X v 3,36 lt H2 ( ktc). Th tch dung dch axit H2SO4 2M cn dng trung ho dung dch X l A. 150ml. B. 75ml. C. 60ml. D. 30ml. 6.(KB-09)-Cu 38 : Ho tan hon ton 2,9 gam hn hp gm kim loi M v oxit ca n vo nc, thu c 500 ml dung dch cha mt cht tan c nng 0,04M v 0,224 lt kh H 2 ( ktc). Kim loi M l A. Ca B. Ba C. K D. Na 7.(C-07)-Cu 6: Khi cho 100ml dung dch KOH 1M vo 100ml dung dch HCl thu c dung dch c cha 6,525 gam cht tan. Nng mol (hoc mol/l) ca HCl trong dung dch dng l A. 0,75M. B. 1M. C. 0,25M. D. 0,5M. (hoc thay khi lng cht tan 7,815 gam, CM, HCl = ?) 8.(C-07)-Cu 1: Khi ha tan hiroxit kim loi M(OH)2 bng mt lng va dung dch H2SO4 20% thu c dung dch mui trung ho c nng 27,21%. Kim loi M l (Mg = 24;Fe = 56;Cu = 64;Zn = 65) A. Cu. B. Zn. C. Fe. D. Mg. 9.(C-07)-Cu 42: Ho tan hon ton hn hp X gm Fe v Mg bng mt lng va dung dch HCl 20%, thu c dung dch Y. Nng ca FeCl2 trong dung dch Y l 15,76%. Nng phn trm ca MgCl2 trong dung dch Y l (Cho H = 1; Mg = 24; Cl = 35,5; Fe = 56) A. 24,24%. B. 11,79%. C. 28,21%. D. 15,76%. (Gi : Chn 1 mol Fe, x mol Mg, tnh khi lng dung dch sau phn ng, tm x C% MgCl2). 10.(KB-08)-Cu 12: Cho 9,12 gam hn hp gm FeO, Fe2O3, Fe3O4 tc dng vi dung dch HCl (d). Sau khi cc phn ng xy ra hon ton, c dung dch Y; c cn Y thu c 7,62 gam FeCl2 v m gam FeCl3. Gi tr ca m l A. 9,75. B. 8,75. C. 7,80. D. 6,50. 11.(KA-08)-Cu 4: ho tan hon ton 2,32 gam hn hp gm FeO, Fe3O4 v Fe2O3 (trong s mol FeO bng s mol Fe2O3), cn dng va V lt dung dch HCl 1M. Gi tr ca V l A. 0,16. B. 0,18. C. 0,08. D. 0,23. 12.(C-09)*-Cu 60: Nung nng 16,8 gam hn hp Au, Ag, Cu, Fe, Zn vi mt lng d kh O2, n khi cc phn ng xy ra hon ton, thu c 23,2 gam cht rn X. Th tch dung dch HCl 2M va phn ng vi cht rn X l A. 600 ml. B. 200 ml. C. 800 ml. D. 400 ml. 13.(KA-08)-Cu 38: Cho 2,13 gam hn hp X gm ba kim loi Mg, Cu v Al dng bt tc dng 17

hon ton vi oxi thu c hn hp Y gm cc oxit c khi lng 3,33 gam. Th tch dung dch HCl 2M va phn ng ht vi Y l A. 90 ml. B. 57 ml. C. 75 ml. D. 50 ml. 14.(C-08)-Cu 38 : Trn 5,6 gam bt st vi 2,4 gam bt lu hunh ri nung nng (trong iu kin khng c khng kh), thu c hn hp rn M. Cho M tc dng vi lng d dung dch HCl, gii phng hn hp kh X v cn li mt phn khng tan G. t chy hon ton X v G cn va V lt kh O2 ( ktc). Gi tr ca V l A. 2,80. B. 3,36. C. 3,08. D. 4,48. 15.(KB-07)-Cu 40: Nung m gam bt st trong oxi, thu c 3 gam hn hp cht rn X. Ha tan ht hn hp X trong dung dch HNO3 (d), thot ra 0,56 lt ( ktc) NO (l sn phm kh duy nht). Gi tr ca m l (cho O = 16, Fe = 56) A. 2,62. B. 2,32. C. 2,22. D. 2,52. 16.(KA-08)-Cu 20 : Cho 11,36 gam hn hp gm Fe, FeO, Fe2O3 v Fe3O4 phn ng ht vi dung dch HNO3 long (d), thu c 1,344 lt kh NO (sn phm kh duy nht, ktc) v dung dch X. C cn dung dch X thu c m gam mui khan. Gi tr ca m l A. 49,09. B. 34,36. C. 35,50. D. 38,72. 6-Tc phn ng- Cn bng ho hc Cu 1: Cho cn bng sau: SO2 + H2O H+ + HSO3 . Khi thm vo dung dch mt t mui NaHSO4 (khng lm thay i th tch) th cn bng trn s A. chuyn dch theo chiu thun.. B. khng chuyn dch theo chiu no. C. chuyn dch theo chiu nghch. D. khng xc nh Cu 2: Cho phng trnh ho hc ca phn ng aA + bB cC Khi tng nng ca B ln 2 ln (gi nguyn nng ca A), tc phn ng thun tng ln 8 ln. b c gi tr l A. 2. B. 3. C. 4. D. 6. o Cu 3: Khi tng nhit ln 10 C, tc phn ng ho hc tng ln 2 ln. Hi tc phn ng s tng ln bao nhiu ln khi nng nhit t 20oC n 60oC ? A. 8 ln. B. 16 ln. C. 32 ln. D. 48 ln. Cu 4: Tc phn ng H2 + I2 2HI s tng ln bao nhiu ln khi nng nhit t 20oC n 170oC ? Bit khi tng nhit ln 25oC, tc phn ng ho hc tng ln 3 ln. A. 729 ln. B. 629 ln. C. 18 ln. D. 108 ln. Cu 5: H cn bng sau xy ra trong mt bnh kn: CaCO 3 (r) CaO (r) + CO2 (k) ; H > 0. Thc hin mt trong nhng bin i sau: (1) Tng dung tch ca bnh phn ng (2) Thm CaCO3 vo bnh phn ln. ng. (3) Ly bt CaO khi bnh phn ng. (4) Tng nhit . yu t no sau y to nn s tng lng CaO trong cn bng ? A. (2), (3), (4). B. (1), (2), (3), (4). C. (2), (3). D. (1), (4). Cu 6: Qu trnh sn xut amoniac trong cng nghip da theo phn ng: N2 (k) + 3H2 (k) 2NH3 (k) ; H < 0 . Nng NH3 lc cn bng s ln hn khi A. nhit v p sut u gim. B. nhit v p sut u tng. C. p sut tng v nhit gim. D. p sut gim v nhit tng. 18

Cu 7: T khi hi ca st (III) clorua khan so vi khng kh nhit 447OC l 10,49 v 517OC l 9,57 v tn ti cn bng sau: 2FeCl3 (kh) Fe2Cl6 (kh) Phn ng nghch c: A . H < 0 , phn ng thu nhit B . H > 0 , phn ng ta nhit C . H > 0 , phn ng thu nhit D . H < 0 , phn ng ta nhit thi i hc 1.(C-2010)-Cu 42: Cho phn ng : Br2 + HCOOH 2HBr + CO2 Nng ban u ca Br2 l a mol/lt, sau 50 giy nng Br2 cn li l 0,01 mol/lt. Tc trung bnh ca phn ng trn tnh theo Br2 l 4.10-5 mol (l.s). Gi tr ca a l A. 0,018 B. 0,016 C. 0,012 D. 0,014 2.(KB-09)-Cu 27: Cho cht xc tc MnO2 vo 100 ml dung dch H2O2, sau 60 giy thu c 33,6 ml kh O2 ( ktc) . Tc trung bnh ca phn ng (tnh theo H2O2) trong 60 giy trn l A. 2,5.10-4 mol/(l.s) B. 5,0.10-4 mol/(l.s) C. 1,0.10-3 mol/(l.s) D. 5,0.10-5 mol/(l.s) 3.(C-07)-Cu 35: Cho phng trnh ho hc ca phn ng tng hp amoniac to, xt 2NH3 (k) N2 (k) + 3H2 (k ) Khi tng nng ca hiro ln 2 ln, tc phn ng thun A. tng ln 8 ln. B. gim i 2 ln. C. tng ln 6 ln. D. tng ln 2 ln. 4.(KA-2010)-*Cu 60: Xt cn bng: N2O4 (k) 2NO2 (k) 250C. Khi chuyn dch sang mt trng thi cn bng mi nu nng ca N2O4 tng ln 9 ln th nng ca NO2 A. tng 9 ln. B. tng 3 ln. C. tng 4,5 ln. D. gim 3 ln. 5.(C-2010)-Cu 23 : Cho cn bng hoa hoc : PCl5 (k) PCl3 (k) + Cl2 (k) ; H > 0 Cn bng chuyn dich theo chiu thun khi A. thm PCl3 vao h phan ng B. tng nhit cua h phan ng C. thm Cl2 vao h phan ng D. tng ap sut cua h phan ng 6.(KB-08)-Cu 23: Cho cn bng ho hc: N2 (k) + 3H2 (k) 2NH3 (k); phn ng thun l phn ng to nhit. Cn bng ho hc khng b chuyn dch khi A. thay i p sut ca h. B. thay i nng N2. C. thay i nhit . D. thm cht xc tc Fe. 7.(KA-08)-Cu 12: Cho cn bng ho hc: 2SO2 (k) + O2 (k) 2SO3 (k); phn ng thun l phn ng to nhit. Pht biu ng l: A. Cn bng chuyn dch theo chiu thun khi tng nhit . B. Cn bng chuyn dch theo chiu thun khi gim p sut h phn ng. C. Cn bng chuyn dch theo chiu nghch khi gim nng O2. D. Cn bng chuyn dch theo chiu nghch khi gim nng SO3. 8.(C-08)-Cu 21: Cho cc cn bng ho hc: N2 (k) + 3H2 (k) 2NH3 (k) (1) H2 (k) + I2 (k) 2HI (k) (2) (k) + O2 (k) (k) (3) (k) O4 (k) 2SO2 2SO3 2NO2 N2 (4) Khi thay i p sut nhng cn bng ha hc b chuyn dch l: A. (1), (2), (3). B. (2), (3), (4). C. (1), (3), (4). 9.(C-09)-Cu 26 : Cho cc cn bng sau : (1) 2SO 2 (k) + O2 (k) 2SO3 (k) o xt,t o o

D. (1), (2), (4).xt,t o

(2) N 2 (k) + 3H2 (k) 2NH3 (k)

t t (3) CO 2 (k) + H 2 (k) CO(k) + H2 O(k) (4) 2HI(k) H 2 (k) + I 2 (k) Khi thay i p sut, nhm gm cc cn bng ho hc u khng b chuyn dch l A. (1) v (3) B. (2) v (4) C. (3) v (4) D. (1) v (2) 10.(KB-2010)-Cu 34: Cho cac cn bng sau (I) 2HI (k) H2 (k) + I2 (k) ; (II) CaCO3 (r) CaO (r) + CO2 (k) ; (III) FeO (r) + CO (k) Fe (r) + CO2 (k) ; (IV) 2SO2 (k) + O2 (k) 2SO3 (k)

19

Khi giam ap sut cua h, s cn bng bi chuyn dich theo chiu nghich la A. 4 B. 3 C. 2 D. 1 11.(C-09)-Cu 50 : Cho cn bng (trong bnh kn) sau : CO (k) + H 2 O (k) CO2 (k) + H2 (k) H < 0 Trong cc yu t: (1) tng nhit ; (2) thm mt lng hi nc; (3) thm mt lng H2; (4) tng p sut chung ca h; (5) dng cht xc tc. Dy gm cc yu t u lm thay i cn bng ca h l : A. (1), (4), (5) B. (1), (2), (4) C. (1), (2), (3) D. (2), (3), (4) 12.(KA-09)-Cu 48: Cho cn bng sau trong bnh kn: 2NO2 (k) N2O4 (k).(mu nu ) (khng mu)

Bit khi h nhit ca bnh th mu nu nht dn. Phn ng thun c: A. H < 0, phn ng thu nhit B. H > 0, phn ng ta nhit C. H > 0, phn ng thu nhit D. H < 0, phn ng ta nhit 13.(KA-2010)-Cu 6: Cho cn bng 2SO2 (k) + O2 (k) 2SO3 (k). Khi tng nhit thi ti khi cua hn hp khi so vi H2 giam i. Phat biu ung khi noi v cn bng nay la : A. Phan ng nghich toa nhit, cn bng dich chuyn theo chiu thun khi tng nhit . B. Phan ng thun toa nhit, cn bng dich chuyn theo chiu nghich khi tng nhit . C. Phan ng nghich thu nhit, cn bng dich chuyn theo chiu thun khi tng nhit . D. Phan ng thun thu nhit, cn bng dich chuyn theo chiu nghich khi tng nhit . 14.(C-08)-*Cu 56: Hng s cn bng ca phn ng xc nh ch ph thuc vo A. nhit . B. p sut. C. cht xc tc. D. nng . 15.(C-09)*-Cu 53 : Cho cc cn bng sau : 1 1 (2) H 2 (k) + I 2 (k) HI (k) (1) H 2 (k) + I2 (k) 2HI (k) 2 21 1 (3) HI (k) H 2 (k) + I 2 (k) 2 2 (5) H 2 (k) + I 2 (r) 2HI (k) (4) 2HI (k) H 2 (k) +I 2 (k)

nhit xc nh, nu KC ca cn bng (1) bng 64 th KC bng 0,125 l ca cn bng A. (5) B. (2) C. (3) D. (4) 16.(KA-09)-*Cu 51: Mt bnh phn ng c dung tch khng i, cha hn hp kh N2 v H2 vi nng tng ng l 0,3 M v 0,7 M. Sau khi phn ng tng hp NH3 t trng thi cn bng t0C, H2 chim 50% th tch hn hp thu c. Hng s cn bng KC t0C ca phn ng c gi tr l A. 2,500 B. 0,609 C. 0,500 D. 3,125 Phn lp 11 v 12 7- S in li - Axit - baz- pH ca dung dch Cu 1: Dung dch X c cha a mol (NH4)2CO3, thm a mol Ba kim loi vo X v un nng dung dch. Sau khi phn ng xy ra hon ton thu c dung dch A. c NH4+, CO32 . B. c Ba2+, OH . C. c NH4+, OH . D. khng cn ion no nu nc khng phn li. Cu 2: Cho dung dch cha cc ion sau: K+, Ca2+, Mg2+, Ba2+, H+, Cl . Mun dung dch thu c cha t loi cation nht c th cho tc dng vi cht no sau y? A. Dung dch Na2CO3. B. Dung dch K2CO3. C. Dung dch NaOH. D. Dung dch Na2SO4. Cu 3: Cho dung dch cha a mol Ca(HCO3)2 vo dung dch cha a mol Ca(HSO4)2. Hin tng quan st c l A. si bt kh v vn c. B. vn c. C. si bt kh. D. vn c, sau trong sut tr li. Cu 4: Cho Ba kim loi ln lt vo cc dung dch sau: NaHCO3, CuSO4, (NH4)2CO3, NaNO3, MgCl2. S dung dch to kt ta l 20

A. 1. B. 2. C. 3. D. 4. Cu 5: Theo nh ngha v axit - baz ca Bron-stt c bao nhiu ion trong s cc ion sau y l baz (c kh nng nhn proton): Na+, Cl , CO32 , HCO3 , CH3COO , NH4+, S2 , ClO4 ? A. 5. B. 2. C. 3. D. 4. Cu 6: Theo nh ngha mi v axit-baz, cc cht v ion thuc dy no di y l lng tnh ? A. CO32 , CH3COO , ZnO, H2O. B. ZnO, Al2O3, HSO4 , H2O. C. NH4+, HCO3 , CH3COO , H2O. D. ZnO, Al2O3, HCO3 , H2O. Cu 7: Dung dch mui no di no di y c pH > 7 ? A. NaHSO4. B. NaNO3. C. NaHCO3. D. (NH4)2SO4. Cu 8: Trong cc dung dch sau y: K2CO3, KCl, CH3COONa, NH4Cl, NaHSO4, Na2S, KHCO3, C6H5ONa c bao nhiu dung dch pH > 7 ? A. 5. B. 2. C. 3. D. 4 Cu 9: Trn dung dch NaHCO3 vi dung dch NaHSO4 theo t l s mol 1 : 1 ri un nng. Sau phn ng thu c dung dch X c A. pH > 7. B. pH < 7. C. pH = 7. D. pH = 14. Cu 10: Dung dch nc ca cht X lm qu tm ng mu xanh, cn dung dch nc ca cht Y khng lm i mu qu tm. Trn ln dung dch ca hai cht th xut hin kt ta. X v Y c th l A. NaOH v K2SO4. B. K2CO3 v Ba(NO3)2. C. KOH v FeCl3. D. Na2CO3 v KNO3. Cu 11: Dung dch no trong s cc dung dch sau nhit phng c gi tr pH nh nht ? A. dung dch AlCl3 0,1M. B. dung dch NaAlO2 (hoc Na[Al(OH)4]) 0,1M. C. dung dch NaHCO3 0,1M. D. dung dch NaHSO4 0,1M. Cu 12: Cho cc dung dch c cng nng mol/lit: CH3COOH; KHSO4; CH3COONa; NaOH. Th t sp xp cc dung dch theo chiu pH tng t tri sang phi l A. KHSO4; CH3COOH; CH3COONa; NaOH B. KHSO4; CH3COOH; NaOH; CH3COONa C. CH3COOH; CH3COONa; KHSO4; NaOH D. CH3COOH; KHSO4; CH3COONa; NaOH Cu 13: Cho cc dung dch c cng nng mol/l: Na2CO3 (1), NaOH (2), Ba(OH)2 (3), CH3COONa (4). Gi tr pH ca cc dung dch c sp xp theo chiu tng t tri sang phi l A. (1), (4), (2), (3) B. (4), (2),(3), (1) C. (3), (2), (1), (4) D. (4), (1), (2), (3) Cu 14: Cho mt mu hp kim Na-Ba vo nc, c 300 ml dung dch X v 0,336 lt H2 (ktc). pH ca dung dch X bng A. 1. B. 13. C. 12. D. 11. Cu 15: Ho tan hon ton m gam Na vo 100 ml dung dch HCl a mol/lt, thu c dung dch X v 0,1a mol kh thot ra . Nhng giy qu tm vo dung dch X, mu tm ca giy qu A. chuyn thnh xanh. B. chuyn thnh . C. gi nguyn mu tm. D. mt mu. Cu 16 Cho 100 ml dung dch gm HNO3 v HCl c pH = 1,0 vo V ml dung dch Ba(OH)2 0,025M thu c dung dch c pH bng 2,0. Gi tr ca V l 21

A. 75. B. 150. C. 200. D. 250. Cu 17: Trn 250 ml dung dch hn hp gm HCl 0,08 mol/l v H2SO4 0,01 mol/l vi 250 ml dung dch Ba(OH)2 a mol/l, thu c m gam kt ta v 500 ml dung dch c pH = 12. Gi tr m l A. 0,233. B. 0,5825. C. 2,330. D. 3,495. Cu 18: Hai dung dch CH3COONa v NaOH c cng pH, nng mol/l ca cc dung dch tng ng l x v y. Quan h gia x v y l A. x = y. B. x > y. C. x < y. D. x = 0,1y. Cu 19: Trong 2 lt dung dch CH3COOH 0,01 M c 12,52.1021 phn t v ion. Phn trm s phn t axit CH3COOH phn li thnh ion l (bit s Avogaro l 6,02.1023) A. 4,10%. B. 3,60%. C. 3,98%. D. 3,89%. Cu 20: Dung dch X cha 5 loi ion: Mg2+, Ba2+, Ca2+, 0,1 mol Cl v 0,2 mol NO3 . Thm t t dung dch K2CO3 1M vo dung dch X n khi c lng kt ta ln nht th th tch dung dch K2CO3 cho vo l A. 150 ml. B. 200 ml. C. 250 ml. D. 300 ml. Cu 21: Dung dch X cha 5 loi ion Mg2+, Ba2+, Ca2+, 0,5 mol Cl v 0,3 mol NO3 . Thm t t dung dch Y cha hn hp K2CO3 1M v Na2CO3 1,5M vo dung dch X n khi c lng kt ta ln nht th th tch dung dch Y cn dng l A. 160 ml. B. 600 ml. C. 320 ml. D. 300 ml. Cu 22: Trong cc cp cht di y, cp cht no cng tn ti trong dung dch? A. Al(NO3)3 v CuSO4. B. NaHSO4 v NaHCO3. C. NaAlO2 (hoc Na[Al(OH)4] ) v HCl. D. NaCl v AgNO3. Cu 23: Dy gm cc ion (khng k n s phn li ca nc) cng tn ti trong mt dung dch l: A. H+, Cr2O72 , Fe3+, SO42 . B. H+, Fe2+, CrO42 , Cl . C. H+, Fe2+, SO42 , NO3 . D. Na+, Cr2O72 , K+, OH . Cu 24: Dung dch X c a mol NH4+, b mol Mg2+, c mol SO42 v d mol HCO3 . Biu thc no biu th s lin quan gia a, b, c, d sau y l ng? A. a + 2b = c + d B. a + 2b = 2c + d C. a + b = 2c + d D. a + b = c + d thi i hc 1.(KB-08)-Cu 15: Cho dy cc cht: KAl(SO4)2.12H2O, C2H5OH, C12H22O11 (saccaroz), CH3COOH, Ca(OH)2, CH3COONH4. S cht in li l A. 3. B. 4. C. 5. D. 2. 2.(KA-2010)-Cu 35: Cho 4 dung dch: H2SO4 long, AgNO3, CuSO4, AgF. Cht khng tc dng c vi c 4 dung dch trn l A. KOH. B. BaCl2. C. NH3. D. NaNO3. 3.(C-09)-Cu 1 : Dy gm cc ion (khng k n s phn li ca nc) cng tn ti trong mt dung dch l : A. H + , Fe 3+ , NO ,SO 2 B. Ag + , Na + , NO ,Cl C. Mg 2+ , K + ,SO 2 , PO3 D. Al3+ , NH + , Br , OH 3 4 3 4 4 4 4.(C-2010)-Cu 22 : Day gm cac ion cung tn tai trong mt dung dich la A. K+,Ba2+,OH ,Cl B. Al3+,PO43 ,Cl , Ba2+ C. Na+ ,K+,OH ,HCO3 D. Ca2+,Cl ,Na+,CO32 5.(KB-07)-Cu 47: Cho 4 phn ng: (1) Fe + 2HCl FeCl2 + H2 (2) 2NaOH + (NH4)2SO4 Na2SO4 + 2NH3 + 2H2O 22

(3) BaCl2 + Na2CO3 BaCO3 + 2NaCl (4) 2NH3 + 2H2O + FeSO4 Fe(OH)2 + (NH4)2SO4 Cc phn ng thuc loi phn ng axit - baz l A. (2), (3). B. (1), (2). C. (2), (4). D. (3), (4). 6.(KB-09)-Cu 13: Cho cc phn ng ha hc sau: (1) (NH4)2SO4 + BaCl2 (2) CuSO4 + Ba(NO3)2 (3) Na2SO4 + BaCl2 (4) H2SO4 + BaSO3 (5) (NH4)2SO4 + Ba(OH)2 (6) Fe2(SO4)3 + Ba(NO3)2 Cc phn ng u c cng mt phng trnh ion rt gn l: A. (1), (2), (3), (6). B. (3), (4), (5), (6). C. (2), (3), (4), (6). D. (1), (3), (5), (6). 7.(C-08)-Cu 10 : Cho dy cc cht : NH4Cl, (NH4)2SO4, NaCl, MgCl2, FeCl2, AlCl3. S cht trong dy tc dng vi lng d dung dch Ba(OH)2 to thnh kt ta l A. 5. B. 4. C. 1. D. 3. 8.(C-08)-Cu 30: Cho dy cc cht: KOH, Ca(NO3)2, SO3, NaHSO4, Na2SO3, K2SO4. S cht trong dy to thnh kt ta khi phn ng vi dung dch BaCl2 l A. 4. B. 6. C. 3. D. 2. 9.(KB-07)-Cu 4: Trong cc dung dch: HNO3, NaCl, Na2SO4, Ca(OH)2, KHSO4, Mg(NO3)2, dy gm cc cht u tc dng c vi dung dch Ba(HCO3)2 l: A. HNO3, Ca(OH)2, KHSO4, Mg(NO3)2. B. HNO3, NaCl, Na2SO4. C. NaCl, Na2SO4, Ca(OH)2. D. HNO3, Ca(OH)2, KHSO4, Na2SO4. 10.(KB-2010)-Cu 8: Cho dung dch Ba(HCO3)2 ln lt vo cc dung dch: CaCl2, Ca(NO3)2, NaOH, Na2CO3, KHSO4, Na2SO4, Ca(OH)2, H2SO4, HCl. S trng hp c to ra kt ta l A. 4. B. 7. C. 5. D. 6. 2+ 2+ 2 11.(KB-08)-Cu 6: Mt mu nc cng cha cc ion: Ca , Mg , HCO3 , Cl , SO4 . Cht c dng lm mm mu nc cng trn l A. Na2CO3. B. HCl. C. H2SO4. D. NaHCO3. 12.(C-08)-Cu 3: Hai cht c dng lm mm nc cng vnh cu l D. NaCl v Ca(OH)2. A. Na2CO3 v HCl. B. Na2CO3 v Na3PO4. C. Na2CO3 v Ca(OH)2. 13.(KB-08)-*Cu 52: Cho cc dung dch: HCl, etylen glicol, NH3, KCl. S dung dch phn ng c vi Cu(OH)2 l A. 1. B. 3. C. 2. D. 4. 14.(KB-07)-Cu 38: Hn hp X cha Na2O, NH4Cl, NaHCO3 v BaCl2 c s mol mi cht u bng nhau. Cho hn hp X vo H2O (d), un nng, dung dch thu c cha A. NaCl, NaOH. B. NaCl. C. NaCl, NaHCO3, NH4Cl, BaCl2. D. NaCl, NaOH, BaCl2. 15.(KA-2010)-Cu 28: Cho cac cht: NaHCO3, CO, Al(OH)3, Fe(OH)3, HF, Cl2, NH4Cl. S cht tac dung c vi dung dich NaOH loang nhit thng la A. 4 B. 5 C. 3 D. 6 16.(KA-08)-Cu 2: Cho cc cht: Al, Al2O3, Al2(SO4)3, Zn(OH)2, NaHS, K2SO3, (NH4)2CO3. S cht u phn ng c vi dung dch HCl, dung dch NaOH l A. 7. B. 6. C. 4. D. 5. 17.(C-09)-Cu 13 : Dy gm cc cht va tc dng c vi dung dch HCl, va tc dng c vi dung dch NaOH l : A. NaHCO3, ZnO, Mg(OH)2 B. Mg(OH)2, Al2O3, Ca(HCO3)2 C. NaHCO3, MgO, Ca(HCO3)2 D. NaHCO3, Ca(HCO3)2, Al2O3 18.(KA-07)-Cu 34: Cho dy cc cht: Ca(HCO3)2, NH4Cl, (NH4)2CO3, ZnSO4, Al(OH)3, Zn(OH)2. S cht trong dy c tnh cht lng tnh l A. 3. B. 5. C. 2. D. 4. 19.(C-08)-*Cu 53: Cho dy cc cht: Cr(OH)3, Al2(SO4)3, Mg(OH)2, Zn(OH)2, MgO, CrO3. S cht trong dy c tnh cht lng tnh l A. 5. B. 2. C. 3. D. 4. 20.(C-07)-*Cu 55: Cc hp cht trong dy cht no di y u c tnh lng tnh? A. Cr(OH)3, Fe(OH)2, Mg(OH)2. B. Cr(OH)3, Zn(OH)2, Pb(OH)2. C. Cr(OH)3, Zn(OH)2, Mg(OH)2. D. Cr(OH)3, Pb(OH)2, Mg(OH)2. 23

21.(KA-07)-*Cu 55 : C 4 dung dch mui ring bit : CuCl2, ZnCl2, FeCl3, AlCl3. Nu thm dung dch KOH (d) ri thm tip dung dch NH3 (d) vo 4 dung dch trn th s cht kt ta thu c l A. 4. B. 1. C. 3. D. 2. 22.(C-07)-Cu 5: Trong s cc dung dch: Na2CO3, KCl, CH3COONa, NH4Cl, NaHSO4, C6H5ONa, nhng dung dch c pH > 7 l A. Na2CO3, C6H5ONa, CH3COONa. B. Na2CO3, NH4Cl, KCl. C. KCl, C6H5ONa, CH3COONa. D. NH4Cl, CH3COONa, NaHSO4. 23.(C-2010)*Cu 57: Dung dch no sau y c pH > 7 ? A. Dung dch NaCl B. Dung dch NH4Cl C. Dung dch Al2(SO4)3 D. Dung dch CH3COONa 24.(KB-09)*-Cu 58: Phn bn no sau y lm tng chua ca t? A. NaNO3 B. KCl C. NH4NO3 D. K2CO3 25.(C-08)Cu 27: Cho cc dung dch c cng nng : Na2CO3 (1), H2SO4 (2), HCl (3), KNO3 (4). Gi tr pH ca cc dung dch c sp xp theo chiu tng t tri sang phi l: A. (3), (2), (4), (1). B. (4), (1), (2), (3). C. (1), (2), (3), (4). D. (2), (3), (4), (1). 2 + 26.(KA-2010)-Cu 1 : Dung dich X co cha: 0,07 mol Na ; 0,02 mol SO 4 va x mol OH . Dung dich Y co cha ClO 4 , NO3 va y mol H+; tng s mol ClO 4 va NO3 la 0,04. Trn X va Y c 100 ml dung dich Z. Dung dich Z co pH (bo qua s in li cua H2O) la A. 1 B. 2 C. 12 D. 13 27.(KA-08)-Cu 10 : Trn ln V ml dung dch NaOH 0,01M vi V ml dung dch HCl 0,03 M c 2V ml dung dch Y. Dung dch Y c pH l A. 4. B. 2. C. 3. D. 1. 15 : Trn 100 ml dung dch (gm Ba(OH)2 0,1M v NaOH 0,1M) vi 400 ml 28.(KB-07)-Cu dung dch (gm H2SO4 0,0375M v HCl 0,0125M), thu c dung dch X. Gi tr pH ca dung dch X l A. 7. B. 6. C. 1. D. 2. 29.(KB-08)-Cu 28 : Trn 100 ml dung dch c pH = 1 gm HCl v HNO3 vi 100 ml dung dch NaOH nng a (mol/l) thu c 200 ml dung dch c pH = 12. -14 Gi tr ca a l (bit trong mi dung dch [H+][OH ] = 10 ) A. 0,15. B. 0,30. C. 0,03. D. 0,12. 30.(KB-2010)*Cu 53: Dung dch axit fomic 0,007M c pH = 3. Kt lun no sau y khng ng? A. Khi pha long 10 ln dung dch trn th thu c dung dch c pH = 4. B. in li ca axit fomic s gim khi thm dung dch HCl. C. Khi pha long dung dch trn th in li ca axit fomic tng. D. in li ca axit fomic trong dung dch trn l 14,29%. 31.(KA-07)-Cu 40 : Cho m gam hn hp Mg, Al vo 250 ml dung dch X cha hn hp axit HCl 1M v axit H2SO4 0,5M, thu c 5,32 lt H2 ( ktc) v dung dch Y (coi th tch dung dch khng i). Dung dch Y c pH l A. 1. B. 6. C. 7. D. 2. 32.(KB-09)-Cu 28 : Trn 100 ml dung dch hn hp gm H2SO4 0,05M v HCl 0,1M vi 100 ml dung dch hn hp gm NaOH 0,2M v Ba(OH)2 0,1M thu c dung dch X. Dung dch X c pH l A. 1,2 B. 1,0 C. 12,8 D. 13,0 33.(KA-07)-Cu 39: Dung dch HCl v dung dch CH3COOH c cng nng mol/l, pH ca hai dung dch tng ng l x v y. Quan h gia x v y l (gi thit, c 100 phn t CH3COOH th c 1 phn t in li) A. y = 100x. B. y = 2x. C. y = x 2. D. y = x + 2. 34.(C-09)-Cu 7 : Cho dung dch cha 0,1 mol (NH4)2CO3 tc dng vi dung dch cha 34,2 gam Ba(OH)2. Sau phn ng thu c m gam kt ta. Gi tr ca m l A. 17,1 B. 19,7 C. 15,5 D. 39,4

35.(C-07)- Cu 31: Mt dung dch cha 0,02 mol Cu , 0,03 mol K , x mol Cl v y mol SO4 . Tng khi lng cc mui tan c trong dung dch l 5,435 gam. Gi tr ca x v y ln lt l 24

2+

+

2

A. 0,03 v 0,02. B. 0,05 v 0,01. C. 0,01 v 0,03. D. 0,02 v 0,05. 3+ 2 + 36.(C-08)-Cu 12: Dung dch X cha cc ion: Fe , SO4 , NH4 , Cl . Chia dung dch X thnh hai phn bng nhau : - Phn mt tc dng vi lng d dung dch NaOH, un nng thu c 0,672 lt kh ( ktc) v 1,07 gam kt ta ; - Phn hai tc dng vi lng d dung dch BaCl2, thu c 4,66 gam kt ta. Tng khi lng cc mui khan thu c khi c cn dung dch X l (qu trnh c cn ch c nc bay hi) A. 3,73 gam. B. 7,04 gam. C. 7,46 gam. D. 3,52 gam. 37.(KA-2010)-Cu 11: Cho dung dich X gm: 0,007 mol Na+; 0,003 mol Ca2+; 0,006 mol Cl ; 0,006 HCO3 va 0,001 mol NO3 . loai bo ht Ca2+ trong X cn mt lng va u dung dich cha a gam Ca(OH)2. Gia tri cua a la A. 0,222 B. 0,120 C. 0,444 D. 0,180 2+ + 38.(KB-2010)-Cu 45: Dung dich X cha cac ion: Ca , Na , HCO3 va Cl , trong o s mol cua ion Cl la 0,1. Cho 1/2 dung dich X phan ng vi dung dich NaOH (d), thu c 2 gam kt tua. Cho 1/2 dung dich X con lai phan ng vi dung dich Ca(OH)2 (d), thu c 3 gam kt tua. Mt khac, nu un si n can dung dich X thi thu c m gam cht rn khan. Gia tri cua m la A. 9,21 B. 9,26 C. 8,79 D. 7.47 39.(KA-2010)-Cu 7: Cho m gam NaOH vao 2 lit dung dich NaHCO3 nng a mol/l, thu c 2 lit dung dich X. Ly 1 lit dung dich X tac dung vi dung dich BaCl2 (d) thu c 11,82 gam kt tua. Mt khac, cho 1 lit dung dich X vao dung dich CaCl2 (d) ri un nong, sau khi kt thuc cac phan ng thu c 7,0 gam kt tua. Gia tri cua a, m tng ng la A. 0,04 va 4,8 B. 0,07 va 3,2 C. 0,08 va 4,8 D. 0,14 va 2,4 40.(KB-09)*-Cu 54: Cho dung dch X cha hn hp gm CH3COOH 0,1M v CH3COONa 0,1M. Bit 250C Ka ca CH3COOH l 1,75.10-5 v b qua s phn li ca nc. Gi tr pH ca dung dch X 25o l A. 1,00 B. 4,24 C. 2,88 D. 4,76 8- Nhm nit- photpho- Amoniac, axit nitric, mui nitrat-Phn bn Cu 1: Cho cc phn ng sau: (1) Cu(NO3)2 t (3) NH3 + CuO t HCl (0 50 ) (5) C6H5NH2 + HNO2 0 0

(2) H2NCH2COOH + HNO2 (4) NH4NO2 t (6) (NH4)2CO3 t 0 0

S phn ng thu c N2 l A. 3, 4, 5. B. 2, 3, 4. C. 1, 2, 3. D. 4, 5, 6. Cu 2: Khi cho bt Zn (d) vo dung dch HNO3 thu c hn hp kh X gm N2O v N2. Khi phn ng kt thc, cho thm NaOH vo li thy gii phng hn hp kh Y. Hn hp kh Y l A. H2, NO2. B. H2, NH3. C. N2, N2O. D. NO, NO2. Cu 3: Cho hai mui X, Y tho mn iu kin sau: X + Y khng xy ra phn ng. X + Cu khng xy ra phn ng. Y + Cu khng xy ra phn ng. X + Y + Cu xy ra phn ng. X v Y l mui no di y ? A. NaNO3 v NaHSO4. B. NaNO3 v NaHCO3. C. Fe(NO3)3 v NaHSO4. D. Mg(NO3)2 v KNO3. Cu 4: Nhit phn hon ton Fe(NO3)2 trong khng kh thu sn phm gm: A. FeO; NO2; O2. B. Fe2O3; NO2. 25

C. Fe2O3; NO2; O2. D. Fe; NO2; O2. Cu 5: Khi cho amoniac tc dng vi axit photphoric thu c amophot. Amophot l hn hp cc mui A. (NH4)3PO4 v (NH4)2HPO4. B. NH4H2PO4 v (NH4)2HPO4. C. KH2PO4 v (NH4)3PO4. D. KH2PO4 v (NH4)2HPO4. Cu 6: Cng thc ho hc ca amophot, mt loi phn bn phc hp l: A. Ca(H2PO4)2. B. NH4H2PO4 v Ca(H2PO4)2. C. NH4H2PO4 v (NH4)2HPO4. D. (NH4)2HPO4 v Ca(H2PO4)2. Cu 7: Thnh phn chnh ca supephotphat kp l A. Ca3(PO4)2. B. Ca(H2PO4)2. C. CaHPO4. D. Ca(H2PO4)2 , CaSO4. Cu 8: Trong cng nghip, tch ring NH3 ra khi hn hp N2, H2, NH3 ngi ta s dng phng php no sau y? A. Cho hn hp qua dung dch axit, sn phm thu c cho tc dng vi dung kim un nng. B. Cho hn hp qua CuO nung nng. C. Cho hn hp qua H2SO4 c. D. Nn v lm lnh hn hp, NH3 ho lng. Cu 9: Trong phng th nghim, ngi ta iu ch kh amoniac bng cch A. cho mui NH4Cl tc dng vi Ca(OH)2 un nng. B. nhit phn mui NH4HCO3, loi b CO2 bng nc vi trong d. C. tng hp t kh N2 v kh H2, xc tc bt Fe, nung nng. D. nhit phn mui NH4Cl, loi b kh HCl bng dung dch NaOH d. Cu 10: Trong phng th nghim, nhn bit ion amoni, ngi ta cho mui amoni tc dng vi dung dch kim un nng. nhn bit kh amoniac sinh ra nn dng cch no trong cc cch sau? A. Ngi. B. Dng dung dch HCl long. C. Dng giy qu tm t. D. Dng dung dch NaOH. Cu 11: nhn bit ion NO3 ngi ta thng dng Cu, dung dch H2SO4 long v un nng v: A. Phn ng to ra dung dch c mu xanh lam v kh khng mi lm xanh giy qu m. B. Phn ng to ra dung dch c mu vng nht. C. Phn ng to dung dch c mu xanh v kh khng mu ha nu trong khng kh. D. Phn ng to kt ta mu xanh. Cu 12: Cho cht v c X tc dng vi mt lng va dung dch KOH, un nng, thu c kh X1 v dung dch X2. Kh X1 tc dng vi mt lng va CuO nung nng, thu c kh X3, H2O, Cu. C cn dung dch X2 c cht rn khan X4 (khng cha clo). Nung X4 thy sinh ra kh X5 (M = 32). Nhit phn X thu c kh X6 (M = 44) v nc. Cc cht X1, X3, X4, X5, X6 ln lt l: A. NH3 ; NO ; KNO3 ; O2 ; CO2 B. NH3 ; N2 ; KNO3 ; O2 ; N2O C. NH3 ; N2 ; KNO3 ; O2 ; CO2 D. NH3 ; NO ; K2CO3 ; CO2 ; O2. Cu 13: Cho 500ml dung dch hn hp gm HNO3 0,2M v HCl 1M. Khi cho Cu tc dng vi dung dch th ch thu c mt sn phm duy nht l NO. Khi lng Cu c th ho tan ti a vo dung dch l A. 3,2 g. B. 6,4 g. C. 2,4 g. D. 9,6 g. Cu 14: Ho tan ht 7,68 gam Cu v 9,6 gam CuO cn ti thiu th tch dung dch hn hp HCl 1M v NaNO3 0,1M (vi sn phm kh duy nht l kh NO) l (cho Cu = 64): A. 80 ml B. 800 ml C. 56 ml D. 560 ml Cu 15: Nhit phn hon ton 9,4 gam mui nitrat ca mt kim loi thu c 4,0 gam mt oxit. Cng thc phn t ca mui nitrat dng l A. Fe(NO3)3. B. Cu(NO3)2. C. Al(NO3)3. D. Pb(NO3)2. 26

Cu 16: Nung hon ton 13,96 gam hn hp AgNO3 v Cu(NO3)2 , thu c cht rn X. Cho X tc dng vi dung dch HNO3 ly d, thu c 448ml kh NO ( ktc). Phn trm theo khi lng ca Cu(NO3)2 trong hn hp u l A. 26,934% B. 27,755%. C. 31,568% D. 17,48%. Cu 17: Trong cng nghip, phn ln supephotphat kp c sn xut theo s chuyn ho: Ca3(PO4)2 H3PO4 Ca(H2PO4)2 Khi lng dung dch H2SO4 70% dng iu ch c 468 kg Ca(H2PO4)2 theo s chuyn ho trn l bao nhiu? Bit hiu sut ca c qu trnh l 80%. A. 392 kg. B. 520 kg. C. 600 kg. D. 700 kg. Cu 18: Hn hp X gm N2 v H2 c t khi so vi H2 bng 3,6. Sau khi tin hnh phn ng tng hp amoniac trong bnh kn (c xc tc bt Fe) thu c hn hp kh Y c t khi so vi H2 bng 4. Hiu sut phn ng tng hp amoniac l A. 10,00%. B. 18,75%. C. 20,00%. D. 25,00%. (lp t l: M1/M2 = n2/n1 , chn n1 = 1 mol, tm n2 , tnh s mol cc cht ban u, phn ng tnh hiu sut phn ng theo cht thiu trong phng trnh phn ng: theo N2 hay H2 ? h =?). thi i hc 1.(C-2010)-Cu 46 : Sn phm ca phn ng nhit phn hon ton AgNO3 l A. Ag, NO2, O2 B. Ag2O, NO, O2 C. Ag, NO, O2 D. Ag2O, NO2, O2 2.(KB-08)-Cu 31: Cho cc phn ng sau: t0 H2S + O2 (d) Kh X + H2O 0 850 C,Pt NH3 + O2 Kh Y + H2O NH4HCO3 + HCl long Kh Z + NH4Cl + H2O Cc kh X, Y, Z thu c ln lt l: A. SO3, NO, NH3. B. SO2, N2, NH3. C. SO2, NO, CO2. D. SO3, N2, CO2. 3.(KA-08)-Cu 1: Choocc phn ng sau: to t (1) Cu(NO3)2 (2) NH4NO2 (3) NH3 + O2 (4) NH3 + Cl2 to to (5) NH4Cl (6) NH3 + CuO Cc phn ng u to kh N2 l: A. (2), (4), (6). B. (1), (2), (5). C. (1), (3), (4). D. (3), (5), (6). 4.(KB-2010)-Cu 35: Cho s chuyn hoa : + H 3 PO4 + KOH + KOH P2O5 X Y Z Cac cht X, Y, Z ln lt la : A. K3PO4, K2HPO4, KH2PO4 B. KH2PO4, K2HPO4, K3PO4 C. K3PO4, KH2PO4, K2HPO4 D. KH2PO4, K3PO4, K2HPO4 5.(KA-08)-Cu 5: Cho Cu v dung dch H2SO4 long tc dng vi cht X (mt loi phn bn ha hc), thy thot ra kh khng mu ha nu trong khng kh. Mt khc, khi X tc dng vi dung dch NaOH th c kh mi khai thot ra. Cht X l A. ure. B. amoni nitrat. C. amophot. D. natri nitrat. 6.(KB-08)-Cu 17 : Thnh phn chnh ca qung photphorit l A. Ca3(PO4)2. B. NH4H2PO4. C. Ca(H2PO4)2. D. CaHPO4. 7.(KA-09)-Cu 50: Pht biu no sau y l ng? A. Phn ur c cng thc l (NH4)2CO3. 27850oC, Pt to

B. Phn hn hp cha nit, photpho, kali c gi chung l phn NPK. C. Phn ln cung cp nit ha hp cho cy di dng ion nitrat (NO3-) v ion amoni (NH4+) D. Amophot l hn hp cc mui (NH4)2HPO4 v KNO3. 8.(C-09)-Cu 41 : Phn bn nitrophotka (NPK) l hn hp ca A. (NH4)2HPO4 v KNO3 B. (NH4)2HPO4 v NaNO3 C. (NH4)3PO4 v KNO3 D. NH4H2PO4 v KNO3 9.(KB-2010)-Cu 16: Mt loi phn supephotphat kp c cha 69,62% mui canxi ihirophotphat, cn li gm cc cht khng cha photpho. dinh dng ca loi phn ln ny l A. 48,52%. B. 42,25%. C. 39,76%. D. 45,75%. 10.(C-08)-Cu 9: Nhit phn hon ton 34,65 gam hn hp gm KNO3 v Cu(NO3)2, thu c hn hp kh X (t khi ca X so vi kh hiro bng 18,8). Khi lng Cu(NO3)2 trong hn hp ban u l A. 8,60 gam. B. 20,50 gam. C. 11,28 gam. D. 9,40 gam. 11.(KA-09)-Cu 30 : Nung 6,58 gam Cu(NO3)2 trong bnh kn khng cha khng kh, sau mt thi gian thu c 4,96 gam cht rn v hn hp kh X. Hp th hon ton X vo nc c 300 ml dung dch Y. Dung dch Y c pH bng A. 2. B. 3. C. 4. D. 1. 12.(KA-2010)-*Cu 53: Cho 0,448 lt kh NH3 (ktc) i qua ng s ng 16 gam CuO nung nng, thu c cht rn X (gi s phn ng xy ra hon ton). Phn trm khi lng ca Cu trong X l A. 12,37%. B. 87,63%. C. 14,12%. D. 85,88%. 13.(KA-2010)-Cu 3 : Hn hp khi X gm N2 va H2 co ti khi so vi He bng 1,8. un nong X mt thi gian trong binh kin (co bt Fe lam xuc tac), thu c hn hp khi Y co ti khi so vi He bng 2. Hiu sut cua phan ng tng hp NH3 la A. 50% B. 36% C. 40% D. 25% 14.(KB-07)-Cu 43: Thc hin hai th nghim: 1) Cho 3,84 gam Cu phn ng vi 80 ml dung dch HNO3 1M thot ra V1 lt NO. 2) Cho 3,84 gam Cu phn ng vi 80 ml dung dch cha HNO3 1M v H2SO4 0,5 M thot ra V2 lt NO. Bit NO l sn phm kh duy nht, cc th tch kh o cng iu kin. Quan h gia V1 v V2 l A. V2 = V1. B. V2 = 2,5V1. C. V2 = 2V1. D. V2 = 1,5V1. 15. (KB-2010)*Cu 51: Cho 0,3 mol bt Cu va 0,6 mol Fe(NO3)2 vao dung dich cha 0,9 mol H2SO4 (loang). Sau khi cac phan ng xay ra hoan toan, thu c V lit khi NO (san phm kh duy nht, ktc). Gia tri cua V la A. 6,72 B. 8,96 C. 4,48 D. 10,08 16.(KA-09)-Cu 1 : Cho hn hp gm 1,12 gam Fe v 1,92 gam Cu vo 400 ml dung dch cha hn hp gm H2SO4 0,5M v NaNO3 0,2M. Sau khi cc phn ng xy ra hon ton, thu c dung dch X v kh NO (sn phm kh duy nht). Cho V ml dung dch NaOH 1M vo dung dch X th lng kt ta thu c l ln nht. Gi tr ti thiu ca V l A. 240. B. 120. C. 360. D. 400. 17.(KB-08)-Cu 46: Th tch dung dch HNO3 1M (long) t nht cn dng ho tan hon ton mt hn hp gm 0,15 mol Fe v 0,15 mol Cu l (bit phn ng to cht kh duy nht l NO) A. 1,0 lt. B. 0,6 lt. C. 0,8 lt. D. 1,2 lt. 18.(KA-09)-Cu 27: Cho 6,72 gam Fe vo 400ml dung dch HNO3 1M, n khi phn ng xy ra hon ton, thu c kh NO (sn phm kh duy nht) v dung dch X. Dung dch X c th ha tan ti a m gam Cu. Gi tr ca m l A. 1,92. B. 0,64. C. 3,84. D. 3,20. 19.(KA-09)-Cu 22: Ha tan hon ton 12,42 gam Al bng dung dch HNO3 long (d), thu c dung dch X v 1,344 lt ( ktc) hn hp kh Y gm hai kh l N2O v N2. T khi ca hn hp kh Y so vi kh H2 l 18. C cn dung dch X, thu c m gam cht rn khan. Gi tr ca m l A. 97,98. B. 106,38. C. 38,34. D. 34,08. 20.(C-09)-Cu 25 : Ho tan hon ton 8,862 gam hn hp gm Al v Mg vo dung dch HNO 3 long, thu c dung dch X v 3,136 lt ( ktc) hn hp Y gm hai kh khng mu, trong c 28

mt kh ho nu trong khng kh. Khi lng ca Y l 5,18 gam. Cho dung dch NaOH (d) vo X v un nng, khng c kh mi khai thot ra. Phn trm khi lng ca Al trong hn hp ban u l A. 12,80% B. 15,25% C. 10,52% D. 19,53% 21.(C-2010)-Cu 27 : Cho a gam Fe vo 100 ml dung dch hn hp gm HNO3 0,8M v Cu(NO3)2 1M. Sau khi cc phn ng xy ra hon ton, thu c 0,92a gam hn hp kim loi v kh +5 NO (sn phm kh duy nht ca N ). Gi tr ca a l A. 8,4 B. 5,6 C. 11,2 D. 11,0 9- Cacbon - Silic Cu 1: Mt loi thu tinh kali cha 18,43% kali oxit, 10,98% canxi oxit v 70,59% silic ioxit v khi lng. Thnh phn ca thu tinh ny c biu din di dng cc oxit l A. 2K2O.CaO.6SiO2 B. K2O.CaO.6SiO2 C. 2K2O.6CaO.SiO2 D. K2O.6CaO.SiO2 thi i hc 1.(KB-2010)-Cu 29: Phat biu nao sau y khng ung ? A. Dung dich m c cua Na2SiO3 va K2SiO3 c goi la thuy tinh long B. am chay magie co th c dp tt bng cat kh C. CF2Cl2 bi cm s dung do khi thai ra khi quyn thi pha huy tng ozon D. Trong phong thi nghim, N2 c iu ch bng cach un nong dung dich NH4NO2 bao hoa 10- Kh CO2 tc dng vi dung dch kim - Mui nhm tc dng vi dung dch kim Mui cacbonat v mui aluminat tc dng vi axit Cu 1: Cho dy dung dch cc cht: Natri hiroxit (d), amoniac (d), axit sunfuric (long), natri cacbonat, natri aluminat, bari clorua. S dung dch trong dy phn ng c vi dung dch nhm clorua to kt ta l A. 5. B. 4. C. 3. D. 2. Cu 2: Mt dung dch X cha a mol NaHCO3 v b mol Na2CO3. Tin hnh hai th nghim sau: -Th nghim 1: Cho X tc dng vi dung dch cha (a + b) mol CaCl2 thu c m1 gam kt ta. -Th nghim 2: Cho X tc dng vi dung dch cha (a + b) mol Ca(OH)2 thu c m2 gam kt ta. Cc phn ng xy ra hon ton. Gi tr ca m2 so vi m1 l A. m2 > m1. B. m2 = m1. C. m2 < m1. D. m2 = 2m1. Cu 3: Cho dung dch cha a mol NaHCO3 vo dung dch cha b mol Ba(OH)2. Sau khi phn ng xong lc b kt ta, thu c dung dch X. Dung dch X cha cht g nu nu b < a < 2b ? (hoc thay 0,5a < b < a )? A. NaHCO3, Ba(HCO3)2 B. NaHCO3, Na2CO3 C. NaOH, Ba(OH)2 D. NaOH, Na2CO3. Cu 4: Cho V lt kh CO2 ( ktc) hp th ht vo 500 ml dung dch NaOH 1M, c cn dung dch sau phn ng thu c 25,2 gam cht rn. Gi tr ca V l A. 8,96. B. 4,48. C. 6,72. D. 5,33. Cu 5: Cho V lt kh CO2 ( ktc) hp th hon ton vo 200 ml dung dch hn hp KOH 1M v Ba(OH)2 0,75M thu c 27,58 gam kt ta. Gi tr ln nht ca V l A. 6,272 lt. B. 8,064 lt. C. 8,512 lt. D. 2,688 lt. Cu 6: Trng hp no sau y khng thy si bt kh ? A. Nh t t (va khuy u) 100 ml dung dch HCl 0,1M vo 100 ml dung dch Na2CO3 0,1M. 29

B. Nh t t (va khuy u) 100 ml dung dch Na2CO3 0,1M vo 100 ml dung dch HCl 0,1M. C. Ngm l nhm trong dung dch NaOH. D. Nh t t (va khuy u) 100 ml dung dch CH3COOH 0,1M vo 100 ml dung dch NaHCO3 0,1M. Cu 7: Cho t t tng git (va khuy u) 100 ml dung dch HCl 2M vo dung dch cha ng thi 0,1 mol NaHCO3 v 0,15 mol Na2CO3 , th tch kh CO2 thu c ktc l: A. 1,12 lt. B. 2,24 lt. C. 3,36 lt. D. 4,48 lt. Cu 8: Cho Vml dung dch NaOH 2M vo dung dch cha 0,035 mol Zn(NO3)2 thu c 2,97 gam kt ta. Th tch dung dch NaOH 2M ln nht cn ly l A. 30 ml. B. 40 ml. C. 50 ml. D. 60 ml. Cu 9: Mt hn hp X c khi lng m gam gm Ba v Al. Cho m gam X tc dng vi nc d, thu c 8,96 lt kh H2. Cho m gam X tc dng vi dung dch Ba(OH)2 d thu c 22,4 lt kh H2. (Cc phn ng u xy ra hon ton, cc th tch kh o iu kin tiu chun). Gi tr ca m l A. 29,9 gam. B. 27,2 gam. C. 16,8 gam. D. 24,6 gam. Cu 10: M l mt kim loi kim. Hn hp X gm M v Al. Ly 3,72 gam hn hp X cho vo H2O d thy gii phng 0,16 gam kh, cn li 1,08 gam cht rn khng tan. M l kim loi no di y A. Cs B. Na C. K D. Rb Cu 11: Ho tan 4,6 gam Na kim loi vo 200 ml dung dch HCl x mol/lt thu c dung dch Y. Cho dung dch Y tc dng vi 100 ml dung dch AlCl 3 0,6M, thu c 1,56 gam kt ta. Gi tr ca x l A. 0,7 M. B. 0,8 M. C. 0,5 M. D. 1,4 M. Cu 12: Cho 8,96 lt kh CO2 (ktc) vo 250 ml dung dch NaOH 2M c dung dch X. Cho X tc dng vi dung dch Ca(OH)2 d c a gam kt ta. Nu cho X tc dng vi dung dch CaCl2 d c b gam kt ta. Gi tr (a b) bng A. 0 . B. 15. C. 10. D. 30. Cu 13: Trn mt dung dch cha a mol NH3 vi dung dch cha b mol HCl, thu c dung dch X. Dung dch X phn ng c vi bao nhiu mol NaOH ? A. (a + b) mol. B. (b a) mol. C. b mol. D. (a b) mol. Cu 14: Cho V ml dung dch HCl 2M vo 300 ml dung dch cha NaOH 0,6M v NaAlO2 (hoc Na[Al(OH)4]) 1M n khi phn ng hon ton, thu c 15,6 gam kt ta. Gi tr ln nht ca V thu c lng kt ta trn l A. 400. B. 490. C. 390. D. 190. Cu 15: Dung dch X cha a mol NaAlO2 (hoc Na[Al(OH)4]). Cho 100ml dung dch HCl 1M vo X, thu c b gam kt ta. Mt khc, nu cho 300 ml dung dch HCl 1M vo X th cng thu c b gam kt ta. Gi tr ca a l A. 0,10. B. 0,25. C. 0,20. D. 0,15. Cu 16: Cho mt ming Na tc dng hon ton vi 100 ml dung dch AlCl3 x (mol/l), sau phn ng thu c 5,6 lt kh ( ktc) v mt lng kt ta. Ly kt ta em nung n khi lng khng i thu c 5,1 gam cht rn. Gi tr ca x l 30

A. 1,1. B. 1,3. C. 1,2. D. 1,5. Cu 17: Trn dung dch cha a mol NaAlO2 (hoc Na[Al(OH)4] )vi dung dch cha b mol HCl. thu c kt ta th cn c t l A. a : b = 1 : 4. B. a : b < 1 : 4. C. a : b = 1 : 5. D. a : b > 1 : 4. thi i hc 1.(C-2010)-Cu 40 : Hp th hon ton 3,36 lt kh CO2 (ktc) vo 125 ml dung dch Ba(OH)2 1M, thu c dung dch X. Coi th tch dung dch khng thay i, nng mol ca cht tan trong dung dch X l A. 0,4M B. 0,2M C. 0,6M D. 0,1M 2.(KA-07)-Cu 24: Hp th hon ton 2,688 lt kh CO2 ( ktc) vo 2,5 lt dung dch Ba(OH)2 nng a mol/l, thu c 15,76 gam kt ta. Gi tr ca a l (cho C = 12, O = 16, Ba = 137) A. 0,032. B. 0,048. C. 0,06. D. 0,04. 3.KA-08)-Cu 3 : Hp th hon ton 4,48 lt kh CO2 ( ktc) vo 500 ml dung dch hn hp gm NaOH 0,1M v Ba(OH)2 0,2M, sinh ra m gam kt ta. Gi tr ca m l A. 9,85. B. 11,82. C. 17,73. D. 19,70. 4.(KA -09)-Cu 38: Cho 0,448 lt kh CO2 ( ktc) hp th ht vo 100 ml dung dch cha hn hp NaOH 0,06M v Ba(OH)2 0,12M, thu c m gam kt ta. Gi tr ca m l A. 3,940. B. 1,182. C. 2,364. D. 1,970. 5.(KB-2010)-Cu 36: t chay hoan toan m gam FeS2 bng mt lng O2 va u, thu c khi X. Hp thu ht X vao 1 lit dung dich cha Ba(OH) 2 0,15M va KOH 0,1M, thu c dung dich Y va 21,7 gam kt tua. Cho Y vao dung dich NaOH, thy xut hin thm kt tua. Gia tri cua m la A. 23,2 B. 12,6 C. 18,0 D. 24,0 6.(KB-07)-Cu 36: Nung 13,4 gam hn hp 2 mui cacbonat ca 2 kim loi ha tr 2, thu c 6,8 gam cht rn v kh X. Lng kh X sinh ra cho hp th vo 75 ml dung dch NaOH 1M, khi lng mui khan thu c sau phn ng l (cho H = 1, C = 12, O = 16, Na = 23) A. 6,3 gam. B. 5,8 gam. C. 6,5 gam. D. 4,2 gam. 7.(C-08)-Cu 17: Dn t t V lt kh CO ( ktc) i qua mt ng s ng lng d hn hp rn gm CuO, Fe2O3 ( nhit cao). Sau khi cc phn ng xy ra hon ton, thu c kh X. Dn ton b kh X trn vo lng d dung dch Ca(OH)2 th to thnh 4 gam kt ta. Gi tr ca V l A. 1,120. B. 0,896. C. 0,448. D. 0,224. 8.(KB-2010)-Cu 46: Hn hp X gm CuO va Fe2O3. Hoa tan hoan toan 44 gam X bng dung dich HCl (d), sau phan ng thu c dung dich cha 85,25 gam mui. Mt khac, nu kh hoan toan 22 gam X bng CO (d), cho hn hp khi thu c sau phan ng li t t qua dung dich Ba(OH)2 (d) thi thu c m gam kt tua. Gia tri cua m la A. 76,755 B. 73,875 C. 147,750 D. 78,875 9.(KA-2010)-Cu 46: Nh t t tng git n ht 30 ml dung dch HCl 1M vo 100 ml dung dch cha Na2CO3 0,2M v NaHCO3 0,2M, sau phn ng thu c s mol CO2 l A. 0,030. B. 0,010. C. 0,020. D. 0,015. 10.(KA-09)-Cu 35: Dung dch X cha hn hp gm Na2CO3 1,5M v KHCO3 1M. Nh t t tng git cho n ht 200 ml dung dch HCl 1M vo 100 ml dung dch X, sinh ra V lt kh ( ktc). Gi tr ca V l A. 4,48. B. 1,12. C. 2,24. D. 3,36. 11.(KA-07)-Cu 11: Cho t t dung dch cha a mol HCl vo dung dch cha b mol Na2CO3 ng thi khuy u, thu c V lt kh ( ktc) v dung dch X. Khi cho d nc vi trong vo dung dch X thy c xut hin kt ta. Biu thc lin h gia V vi a, b l: A. V = 22,4(a b) B. V = 11,2(a b) C. V = 11,2(a + b) D. V = 22,4(a + b) 12.(KB-09)-Cu 44: Cho 100 ml dung dch KOH 1,5M vo 200 ml dung dch H 3PO4 0,5M, thu c dung dch X. C cn dung dch X, thu c hn hp gm cc cht l A. K3PO4 v KOH B. KH2PO4 v K3PO4 C. KH2PO4 v H3PO4 D. KH2PO4 v K2HPO4 13.(KB-08)-Cu 41: Cho 0,1 mol P2O5 vo dung dch cha 0,35 mol KOH. Dung dch thu c c 31

cc cht: A. K3PO4, K2HPO4. B. K2HPO4, KH2PO4. C.K3PO4, KOH. D.H3PO4, KH2PO4. 14.(KA-07)-Cu 3: Nh t t cho n d dung dch NaOH vo dung dch AlCl3. Hin tng xy ra l A. c kt ta keo trng, sau kt ta tan. B. ch c kt ta keo trng. C. c kt ta keo trng v c kh bay ln. D. khng c kt ta, c kh bay ln. 15.(KA-07)-Cu 21: Trn dung dch cha a mol AlCl3 vi dung dch cha b mol NaOH. thu c kt ta th cn c t l A. a : b = 1 : 4. B. a : b < 1 : 4. C. a : b = 1 : 5. D. a : b > 1 : 4. 16.(KB-07)-Cu 21: Cho 200 ml dung dch AlCl3 1,5M tc dng vi V lt dung dch NaOH 0,5M, lng kt ta thu c l 15,6 gam. Gi tr ln nht ca V l (cho H = 1, O = 16, Al = 27) A. 1,2. B. 1,8. C. 2. D. 2,4. 17.(C-09)-Cu 38 : Ho tan hon ton 47,4 gam phn chua KAl(SO4)2.12H2O vo nc, thu c dung dch X. Cho ton b X tc dng vi 200 ml dung dch Ba(OH)2 1M, sau phn ng thu c m gam kt ta. Gi tr ca m l A. 46,6 B. 54,4 C. 62,2 D. 7,8 18.(KA-08)-Cu 26: Cho V lt dung dch NaOH 2M vo dung dch cha 0,1 mol Al2(SO4)3 v 0,1 mol H2SO4 n khi phn ng hon ton, thu c 7,8 gam kt ta. Gi tr ln nht ca V thu c lng kt ta trn l A. 0,35. B. 0,25. C. 0,45. D. 0,05. 19.(C-09)-Cu 32 : Ho tan hon ton m gam hn hp X gm Na2O v Al2O3 vo H2O thu c 200 ml dung dch Y ch cha cht tan duy nht c nng 0,5M. Thi kh CO 2 (d) vo Y thu c a gam kt ta. Gi tr ca m v a ln lt l : A. 13,3 v 3,9 B. 8,3 v 7,2 C. 11,3 v 7,8 D. 8,2 v 7,8 20.(KA-08)-Cu 28: Ho tan hon ton 0,3 mol hn hp gm Al v Al4C3 vo dung dch KOH (d), thu c a mol hn hp kh v dung dch X. Sc kh CO2 (d) vo dung dch X, lng kt ta thu c l 46,8 gam. Gi tr ca a l A. 0,60. B. 0,55. C. 0,45. D. 0,40. 21.(C-07)-Cu 21: Thm m gam kali vo 300ml dung dch cha Ba(OH)2 0,1M v NaOH 0,1M thu c dung dch X. Cho t t dung dch X vo 200ml dung dch Al2(SO4)3 0,1M thu c kt ta Y. thu c lng kt ta Y ln nht th gi tr ca m l A. 1,59. B. 1,17. C. 1,71. D. 1,95. 22.(KB-07)-Cu 34: Hn hp X gm Na v Al. Cho m gam X vo mt lng d nc th thot ra V lt kh. Nu cng cho m gam X vo dung dch NaOH (d) th c 1,75V lt kh. Thnh phn phn trm theo khi lng ca Na trong X l (bit cc th tch kh o trong cng iu kin) A. 39,87%. B. 29,87%. C. 49,87%. D. 77,31%. 23.(KA-08)-Cu 22: Cho hn hp gm Na v Al c t l s mol tng ng l 1 : 2 vo nc (d). Sau khi cc phn ng xy ra hon ton, thu c 8,96 lt kh H2 ( ktc) v m gam cht rn khng tan. Gi tr ca m l A. 43,2. B. 5,4. C. 7,8. D. 10,8. 24.(KA-09)- Cu 10: Ha tan ht m gam ZnSO4 vo nc c dung dch X. Cho 110ml dung dch KOH 2M vo X, thu c a gam kt ta. Mt khc, nu cho 140 ml dung dch KOH 2M vo X th cng thu c a gam kt ta. Gi tr ca m l A. 20,125. B. 12,375. C. 22,540. D. 17,710. 25.(KA-2010)-Cu 18: Hoa tan hoan toan m gam ZnSO4 vao nc c dung dich X. Nu cho 110 ml dung dich KOH 2M vao X thi thu c 3a gam kt tua. Mt khac, nu cho 140 ml dung dich KOH 2M vao X thi thu c 2a gam kt tua. Gia tri cua m la A. 32,20 B. 24,15 C. 17,71 D. 16,10 26.(KB-2010)-Cu 28: Cho 150 ml dung dich KOH 1,2M tac dung vi 100 ml dung dich AlCl 3 nng x mol/l, thu c dung dich Y va 4,68 gam kt tua. Loai bo kt tua, thm tip 175 ml dung dich KOH 1,2M vao Y, thu c 2,34 gam kt tua. Gia tri cua x la A. 1,2 B. 0,8 C. 0,9 D. 1,0 32

27.(C-09)-Cu 4 : Nh t t 0,25 lt dung dch NaOH 1,04M vo dung dch gm 0,024 mol FeCl3; 0,016 mol Al2(SO4)3 v 0,04 mol H2SO4 thu c m gam kt ta. Gi tr ca m l A. 4,128 B. 2,568 C. 1,560 D. 5,064 11- iu ch- Nhn bit Tch ring Tinh ch cht Cu 1: C th phn bit 3 dung dch KOH, HCl, H2SO4 (long) bng mt thuc th l A. Mg. B. giy qu tm. C. CaCO3. D. phenolphtalein. Cu 2: Ch dng thm dung dch H2SO4 long, c th nhn bit c bao nhiu kim loi trong s cc kim loi: Mg, Al, Fe, Cu, Ba? A. 2. B. 3. C. 4. D. 5. Cu 3: C 4 cht bt mu trng ring bit: CaSO4.2H2O, Na2SO4, CaCO3, Na2CO3. Nu ch c dng dung dch HCl lm thuc th th c th nhn bit c A. 1 cht. B. 2 cht. C. 3 cht. D. c 4 cht. Cu 4: C bn ng nghim mt nhn ng ring bit cc dung dch khng mu gm NH4HCO3; NaAlO2 (hoc Na[Al(OH)4]); C6H5ONa; C2H5OH. Ch dng mt ho cht no sau y phn bit bn dung dch trn? A. dung dch NaOH. B. dung dch HCl. C. kh CO2. D. dung dch BaCl2. Cu 5: C 6 l ring ring r cha dung dch long cc cht sau: Na2SO4, NaHSO4, NaOH, H2SO4, Na2CO3, BaCl2. Ch dng qu tm v chnh cc dung dch trn lm thuc th, c th nhn bit c ti a my dung dch ? A. phn bit c c 6 dung dch. B. ch phn bit c H2SO4 v NaOH. C. phn bit c 4 dung dch. D. phn bit c 3 dung dch. Cu 6: Cho cc dung dch: NaCl, Na2CO3, NaHSO4, Na2SO4, NaOH. Ch dng qu tm v chnh cc dung dch trn lm thuc th c th nhn bit ti a my dung dch ? A. 1. B. 2. C. 3. D. 4. Cu 7: C 4 dung dch b mt nhn gm Na2CO3 , NaOH , Na2SO4 , HCl. Thuc th tt nht no trong s cc thuc th sau c th dng phn bit cc dung dch trn? A. Dung dch AgNO3. B. Dung dch BaCl2. C. Qu tm. D. Dung dch H2SO4. + 2+ Cu 8: Dung dch cha cc ion Na , Ca , Mg2+, Ba2+, H+, Cl . Phi dng dung dch cht no sau y loi b ht cc ion Ca2+, Mg2+, Ba2+, H+ ra khi dung dch ban u? A. K2CO3. B. NaOH. C. Na2SO4. D. AgNO3. Cu 9: tch Ag ra khi hn hp Ag v Cu ngi ta ch cn dng A. O2 v dung dch HCl. B. dung dch HNO3. C. dung dch H2SO4 c. D. dung dch CH3COOH. Cu 10: C 4 kim loi : Mg, Ba, Zn, Fe. C th dng dung dch cht no trong s dung dch cc cht cho di y nhn bit cc kim loi ? A. H2SO4 long B. HCl C. NaOH D. BaCl2 Cu 11: Ch dng mt ho cht no di y phn bit hai bnh mt nhn cha kh C2H2 v HCHO? A. dung dch AgNO3 (hoc Ag2O) trong NH3. B. dung dch NaOH. C. dung dch Br2. D. Cu(OH)2. 33

Cu 12: C 4 ng nghim khng nhn, mi ng ng mt trong cc dung dch sau (nng khong 0,01M): NaCl, Na2CO3, KHSO4 v CH3NH2. Ch dng giy qu tm ln lt nhng vo tng dung dch, quan st s i mu ca n c th nhn bit c dy dung dch no? A. Dung dch NaCl. B. Hai dung dch NaCl v KHSO4. C. Hai dung dch KHSO4 v CH3NH2. D. Ba dung dch NaCl, KHSO4 v Na2CO3. Cu 13: C 5 dung dch ho cht khng nhn, mi dung dch nng khong 0,1M ca mt trong cc mui sau: NaCl, Ba(HCO3)2, Na2CO3, Na2S, Na2SO4. Ch dng dung dch H2SO4 long nh trc tip vo tng dung dch th c th nhn bit c dung dch no? A. Hai dung dch: Ba(HCO3)2, Na2CO3. B. Ba dung dch: Ba(HCO3)2, Na2CO3, Na2S. C. Hai dung dch: Ba(HCO3)2, Na2S. D. Hai dung dch: Ba(HCO3)2, NaCl. Cu 14: phn bit ba bnh kh khng mu mt nhn ng cc cht CH4, C2H2, HCHO ch dng mt ho cht di y l A. dung dch AgNO3/NH3, to. B. Cu(OH)2 /OH , to. C. dung dch Br2. D. kh H2 (xc tc Ni, to). thi i hc 1.(KA-07)-Cu 4: Trong phng th nghim, iu ch mt lng nh kh X tinh khit, ngi ta un nng dung dch amoni nitrit bo ho. Kh X l A. NO. B. NO2. C. N2O. D. N2. 2.(KB-07)-Cu 18: Trong phng th nghim, ngi ta thng iu ch HNO3 t A. NaNO3 v H2SO4 c. B. NaNO3 v HCl c. C. NH3 v O2. D. NaNO2 v H2SO4 c. 3.(C-09)-Cu 8 : Nguyn tc chung c dng iu ch kim loi l A. cho hp cht cha ion kim loi tc dng vi cht kh. B. kh ion kim loi trong hp cht thnh nguyn t kim loi. C. oxi ho ion kim loi trong hp cht thnh nguyn t kim loi D. cho hp cht cha ion kim loi tc dng vi cht oxi ho. 4.(KA-07)-Cu 46: Dy gm cc kim loi c iu ch trong cng nghip bng phng php in phn hp cht nng chy ca chng, l: A. Na, Ca, Al. B. Na, Ca, Zn. C. Na, Cu, Al. D. Fe, Ca, Al. 5.(C-08)-Cu 48: Hai kim loi c th c iu ch bng phng php in phn dung dch l A. Al v Mg. B. Na v Fe. C. Cu v Ag. D. Mg v Zn. 6.(KA-09)-Cu 39: Dy cc kim loi c th c iu ch bng phng php in phn dung dch mui ca chng l A. Mg, Zn, Cu. B. Fe, Cu, Ag. C. Al, Fe, Cr. D. Ba, Ag, Au. 2+ 7.(C-07)-Cu 23: kh ion Cu trong dung dch CuSO4 c th dng kim loi A. Fe. B. Na. C. K. D. Ba. 8.(C-07)-Cu 17: Trong cng nghip, natri hiroxit c sn xut bng phng php A. in phn dung dch NaCl, khng c mng ngn in cc. B. in phn dung dch NaNO3, khng c mng ngn in cc. C. in phn dung dch NaCl, c mng ngn in cc. D. in phn NaCl nng chy. 9.(KB-09)-Cu 37: Thc hin cc th nghim sau : (I) Cho dung dch NaCl vo dung dch KOH. (II) Cho dung dch Na2CO3 vo dung dch Ca(OH)2 (III) in phn dung dch NaCl vi in cc tr, c mng ngn (IV) Cho Cu(OH)2 vo dung dch NaNO3 (V) Sc kh NH3 vo dung dch Na2CO3. 34

(VI) Cho dung dch Na2SO4 vo dung dch Ba(OH)2. Cc th nghim u iu ch c NaOH l: A. II, V v VI B. II, III v VI C. I, II v III D. I, IV v V 10.(KB-07)-Cu 28: C th phn bit 3 dung dch: KOH, HCl, H2SO4 (long) bng mt thuc th l A. Zn. B. Al. C. giy qu tm. D. BaCO3. 11.(KB-07)-Cu 8: thu c Al2O3 t hn hp Al2O3 v Fe2O3, ngi ta ln lt: A. dng kh CO nhit cao, dung dch HCl (d). B. dng kh H2 nhit cao, dung dch NaOH (d). C. dng dung dch NaOH (d), dung dch HCl (d), ri nung nng. D. dng dung dch NaOH (d), kh CO2 (d), ri nung nng. 12.(KA-07)-Cu 25: nhn bit ba axit c, ngui: HCl, H2SO4, HNO3 ng ring bit trong ba l b mt nhn, ta dng thuc th l A. Fe. B. CuO. C. Al. D. Cu. 13. (C-2010)*Cu 59: Thuc th dng phn bit 3 dung dch ring bit : NaCl, NaHSO4, HCl l A. NH4Cl B. (NH4)2CO3 C. BaCl2 D. BaCO3 14.(C-2010)-Cu 44 : Thuc th dng phn bit dung dch NH4NO3 vi dung dch (NH4)2SO4 l A. dung dch NaOH v dung dch HCl B. ng(II) oxit v dung dch HCl C. ng(II) oxit v dung dch NaOH D. kim loi Cu v dung dch HCl 15.(KA-09)-Cu 42: C nm dung dch ng ring bit trong nm ng nghim: (NH4)2SO4, FeCl2, Cr(NO3)3, K2CO3, Al(NO3)3. Cho dung dch Ba(OH)2 n d vo nm dung dch trn. Sau khi phn ng kt thc, s ng nghim c kt ta l A. 5. B. 2. C. 4. D. 3 16.(C-09)-Cu 5 : Ch dng dung dch KOH phn bit c cc cht ring bit trong nhm no sau y ? A. Zn, Al2O3, Al B. Mg, K, Na C. Mg, Al2O3, Al D. Fe, Al2O3, Mg 17.(C-09)-Cu 17 : phn bit CO2 v SO2 ch cn dng thuc th l A. dung dch Ba(OH)2 B. CaO. C. dung dch NaOH D. nc brom 18.(C-09)-Cu 16 : Cht dng lm kh kh Cl2 m l A. dung dch H2SO4 m c B. Na2SO3 khan C. CaO D. dung dch NaOH c 19.(KB-2010)-Cu 4: Phng php loi b tp cht HCl c ln trong kh H2S l: Cho hn hp kh li t t qua mt lng d dung dch A. Pb(NO3)2. B. NaHS. C. AgNO3. D. NaOH. 12- Dy in ho Kim loi tc dng vi dung dch mui - n mn kim loi in phn Cu 1: C cc ion ring bit trong cc dung dch l Ni2+, Zn2+, Ag+, Fe2+, Fe3+, Pb2+. Ion d b kh nht v ion kh b kh nht ln lt l A. Pb2+ v Ni2+. B. Ag+ v Zn2+. C. Ag+ v Fe2+. D. Ni2+ v Fe3+. Cu 2: So snh tnh kim loi ca 4 kim loi X, Y, Z, R. Bit rng: (1) Ch c X v Z tc dng c vi dung dch HCl gii phng H2. (2) Z y c cc kim loi X, Y, R ra khi dung dch mui . (3) R + Yn+ Rn+ + Y A. X < Y < Z < R. B. Y < R < X < Z. C. X < Z < Y < R. D. R < Y < X < Z. Cu 3: Cho phn ng: Fe(NO3)2 + AgNO3 Fe(NO3)3 + Ag Pht biu no sau y l ng ? A. Fe2+ c tnh oxi ho mnh hn Fe3+. B. Fe3+ c tnh oxi ho mnh hn Ag+. C. Ag c tnh kh mnh hn Fe2+. D. Fe2+ kh c Ag+. 35

Fe + Cu2+ Fe2+ + Cu (1) ; 2+ 3+ 2Fe + Cl2 2Fe + 2Cl (2); 3+ 2+ 2+ 2Fe + Cu 2Fe + Cu (3). Dy cc cht v ion no sau y c xp theo chiu gim dn tnh oxi ho: A. Cu2+ > Fe2+ > Cl2 > Fe3+ B. Cl2 > Cu2+ > Fe2+ > Fe3+ . 3+ 2+ 2+ C Cl2 > Fe > Cu > Fe D. Fe3+ > Cl2 > Cu2+ > Fe2+ Cu 5 : Trong qu trnh in phn dung dch KCl, qu trnh no sau y xy ra cc dng (anot) A. ion Cl b oxi ho. B. ion Cl b kh. C. ion K+ b kh. D. ion K+ b oxi ho. Cu 6: Khi vt bng gang, thp b n mn in ho trong khng kh m, nhn nh no sau y ng? A. Tinh th st l cc dng, xy ra qu trnh kh. B. Tinh th st l cc m, xy ra qu trnh oxi ho. C. Tinh th cacbon l cc dng, xy ra qu trnh oxi ho. D. Tinh th cacbon l cc m, xy ra qu trnh oxi ho. Cu 7: Pht biu no di y khng ng v bn cht qu trnh ho hc in cc trong khi in phn ? A. Anion nhng electron anot. B. Cation nhn electron catot. C. S oxi ho xy ra anot. D. S oxi ho xy ra catot. Cu 8: Mun m ng ln mt tm st bng phng php in ho th phi tin hnh in phn vi in cc v dung dch: A. Cc m l ng, cc dng l st, dung dch mui st. B. Cc m l ng, cc dng l st, dung dch mui ng. C. Cc m l st, cc dng l ng, dung dch mui st. D. Cc m l st, cc dng l ng, dung dch mui ng. Cu 9: Th tch kh hiro sinh ra khi in phn dung dch cha cng mt lng NaCl c mng ngn (1) v khng c mng ngn (2) l: A. bng nhau. B. (2) gp i (1). C. (1) gp i (2). D. khng xc nh. Cu 10: in phn dung dch cha HCl v KCl vi mng ngn xp, sau mt thi gian thu c dung dch ch cha mt cht tan v c pH = 12. Vy: A. HCl v KCl u b in phn ht. B. ch c KCl b in phn. C. ch c HCl b in phn. D. HCl b in phn ht, KCl b in phn mt phn. Cu 11: Cho hn hp A gm Al v Fe tc dng vi dung dch CuCl2. Khuy u hn hp, lc ra kt ta, thu c dung dch B v cht rn C. Thm vo B mt lng dung dch NaOH long d, lc ra kt ta mi to thnh. Nung kt ta trong khng kh nhit cao thu c cht rn D gm hai oxit kim loi. Tt c cc phn ng u xy ra hon ton. Hai oxit kim loi l: A. Al2O3, Fe2O3 B. Al2O3, CuO C. Al2O3, Fe3O4 D. Fe2O3, CuO Cu 12: Nhng mt thanh nhm nng 50 gam vo 400 ml dung dch CuSO4 0,5M. Sau mt thi gian, ly thanh nhm ra, ra nh, lm kh cn c 51,38 gam (gi s tt c Cu thot ra u bm vo thanh nhm). Khi lng Cu to thnh l A. 0,64 gam. B. 1,38 gam. C. 1,92 gam. D. 2,56 gam. Cu 13: Cho mt hn hp gm 0,56 gam Fe v 0,64 gam Cu vo 100ml dung dch AgNO 3 0,45M. Khi kt thc phn ng thu c dung dch X . Nng mol/lt ca dung dch Fe(NO3)2 trong X l: A. 0,04 B. 0,05. C. 0,055. D. 0,045. Cu 4: Cho cc phn ng: 36

Cu 14: Cho mt hn hp gm c 1,12 gam Fe v 0,24 gam Mg tc dng vi 250 ml dung dch CuSO4. Phn ng thc hin xong, ngi ta thu c kim loi c khi lng l 1,84 gam. Nng mol/l ca dung dch CuSO4 l A. 0,04 M. B. 0,20 M. C. 0,08 M. D. 0,10 M. Cu 15: Nhng mt l Ni nng 35,9 gam vo 555 gam dung dch Fe2(SO4)3 10%, sau mt thi gian, nng phn trm khi lng ca st(III) sunfat cn li trong dung dch bng nng phn trm khi lng ca NiSO4. Khi lng ca l Ni sau phn ng l A. 25,9 gam B. 30,0 gam C. 27,9 gam D. 32,95 gam Cu 16: Cho mt t bt st vo dung dch AgNO3 d, phn ng xong thu c dung dch X gm A. Fe(NO3)2 , H2O. B. Fe(NO3)2 , AgNO3 d, H2O. C. Fe(NO3)3 , AgNO3 d, H2O. D. Fe(NO3)2 , Fe(NO3)3 , AgNO3 d, H2O. Cu 17: Cho hn hp Cu, Fe vo dung dch H2SO4 c nng. Sau phn ng, thu c dung dch E ch cha mt cht tan l: A. CuSO4. B. FeSO4. C. H2SO4. D. Fe2(SO4)3. Cu 18: Cho 50 ml dung dch FeCl2 1M vo dung dch AgNO3 d, sau phn ng thu c m gam cht rn. (Cho Ag c tnh kh yu hn ion Fe2+ , ion Fe3+ c tnh oxi ho yu hn ion Ag+ ). Gi tr ca m l A. 14,35. B. 15,75. C. 18,15. D. 19,75. Cu 19: Cho 11,6 gam mui FeCO3 tc dng va vi dung dch HNO3, c hn hp kh