THI HC SINH GII TNH HI DNG NM HC 2002 2003Mn thi: Ha hc Lp 12Thi gian lm bi: 180 pht (khng k giao )Cu 1 (2,5 im)1) Mt hn hp bt mu trng gm: NaCl; AlCl3; MgCO3 v BaCO3. Trnh by phng php ha hc tch ring tng cht ra khi hn hp (lng cht khng i).2) A, B, C v D u l cc cht v c, tan trong nc, dung dch A, D lm qu tm, dung dch C lm xanh qu tm. t chy A, C nhit cao cho ngn la mu vng. Khi cho A, B v D vo dung dch Ba(OH)2, A to kt ta trng khng tan trong acid, B v D u to ra kt ta trng v cht kh A2 thot ra gp kh hidroclorua to khi trng. Cho A vo dung dch B, C v D nhn thy: B, C to ra cht kh B1 cn D to ra cht kh D1, hai kh ny lm vn c nc vi trong. D1 lm mt mu dung dch KMnO4. Cho B vo dung dch NaCl bo ha to thnh cht E tan t trong nc. nhit cao cht E b phn hy tnh C, cho C vo dung dch AlCl3 va c kt ta, va c kh to thnh. Xc nh cng thc phn t ca A, B, C v D. Vit cc phng trnh phn ng xy ra.Cu 3 (3,0 im)1) Cho cc cht: Metanol (A), nc (B), Etanol (C), axit axetic (D), phenol (E) v axit propionic (F). Tnh linh ng ca nguyn t H trong nhm OH ca phn t mi cht tng theo chiu th t sau:

a1 - A < B < C < E < F < Da2 - A < C < B < E < D < Fa3 - B < A < C < E < F < Da4 - C < A < B < E < F < D

Hy chn cu tr li ng v gii thch (ngn gn)2) Hai axit cacboxylic X, Y ng ng ca nhau. t X thu c x mol CO2 v p mol H2O. t chy Y thu c y mol CO2 v q mol H2O vi h thc sau: a. Lp lun tm ra cng thc tng qut ca X v Yb.

Cho , khi lng phn t (vC). Vit cc cng thc cu to ca X v Yc. T X v cc cht v c, cht xc tc v iu kin cn thit. Vit phng trnh phn ng (ghi r iu kin) iu ch etylaxetat; polivinylaxetat.Cu III (2,5 im)Ha tan hon ton 6,06 gam hn hp E gm Mg v kim loi M c ha tr khng i cn V lt dung dch HNO3 0,2M thu c 0,896 lt ( ktc) hn hp kh gm N2 v N2O c t khi so vi H2 bng 20 v dung dch F. Chia dung dch F thnh hai phn bng nhau:+ Phn 1: em c cn thu c 22,21 gam mui khan.+ Phn 2: Cho tc dng vi dung dch NaOH d thu c 4,06 gam kt ta trng.1. Xc nh kim loi M v khi lng ca tng kim loi trong hn hp2. Tnh V3. Vit phng trnh phn ng ha tan E trong dung dnh HNO3 dng ion thu gnCu IV (2,0 im)Hn hp Z gm hai este n chc Z1 v Z2. Cho 0,3 mol hn hp Z phn ng va vi 250 ml NaOH 2M un nng, thu c mt andehit no mch h v 47,8 gam hai mui hu c. Bit khi lng mui ny nhiu hn khi lng mui kia 1,4 gam. Trong andehit oxi chim 36,364% v khi lng. Xc nh cng thc cu to ca Z1 v Z2. Bit Z2 lm mt mu dung dch nc brom.

THI HC SINH GII TNH HI DNG NM HC 2009 2010Mn thi: Ha hc Lp 12Thi gian lm bi: 180 pht (khng k giao )

Cu 1 (2,0 im)1) Nu hin tng xy ra v vit phng trnh trong cc th ngim sau:a. Cho t t dung dch HCl vo dung dch cha hn hp gm Na2CO3 , KHCO3.b. Cho t t dung dch metyl amin vo dung dch NaOH v ngc li.2) Nu phng php iu ch ring tng kim loi t hn hp th rn : NaCl, BaCl2, AlCl3, CuCl2 m khng lm thay i khi lng kim loi.Cu 2 (2,0 im):1. Xc nh CTCT ca cc cht tng ng vi k hiu A, B, C, D, E, F, G. Vit phng trnh phn ng, ghi r iu kin phn ng thc hin s chuyn ho sau:

C P.V.CCH4 A BD +CuO E +O2,xt F -----------GBit G l imetyl oxalat.

2. Cho cc cht sau amniac, anilin, p - nitroanilin, m - nitroanilin, metylamin, p - metylanilin. Sp xp cc cht t tri qua phi theo chiu tng dn tnh baz (c gii thch).

3. Hp cht hu c no mch h A (ch cha C, H, O), c t khi vi He l 26. Cho A tc dng vi NaHCO3 d thy c s mol CO2 bng s mol A dng. Cn nu cho 15,6 gam A tc dng Na d th thu c 3,36 lt H2 (ktc). Xc nh CTCT c th c ca A v gi tn theo danh php thay th.

Cu 3 (2,0 im):1. Cho m gam bt Fe vo 800 ml dung dch cha hn hp Cu(NO3)2 0,2 M v dung dch H2SO4 0,25 M sau khi phn ng xy ra hon ton c V lt NO l sn phm kh duy nht ca mui nitrat ( ktc) v 0,6m gam rn. Tnh m v V.2. Xut pht t nguyn liu u l metan, cc cht v c v iu kin cn thit c , vit cc phng trnh phn ng (ghi r iu kin nu c) iu ch:a.cao su buna-S. b. Poli (metyl acrylat).Cu 4 (2,0 im):Cho hn hp X dng bt gm Fe2O3 v Al thc hin phn ng nhit nhm thu c hn hp rn A. Chia thnh 2 phn :- Phn 1 : Cho tc dng vi un dch NaOH d thu c 3.36 lt H2 v phn rn khng tan c khi lng bng 46,473% khi lng phn 1.- Phn 2 cho tc dng vi dung dch HCl d thu c15,68 lt kh H2.Cc phn ng xy ra hon ton, th tch kh o ktc.a. Vit phng trnh phn ng y ra.b. Tnh khi lng cc cht trong hn hp X.Cu 5 (2,0 im):Hn hp A gm hp cht hu c X v este Y ca 1 axit hu c n chc. Ly a gam A cho tc dng vi lng dung dch NaOH va , sau khi phn ng kt thc, chng ct v tch hn hp sn phm c 11,4 gam cht hu c no mch h Z v 39,4 gam hn hp mui hu c khan. em ton b lng mui hu c nung vi vi ti xt d n hon ton thu c 4,48 lt hi ca mt hidrocacbon duy nht 00C v 2 atm. t chy hon ton 1 mol Z cn va 4 mol O2, Z c phn ng vi Cu(OH)2 to dung dc mu xanh thm.a.Xc nh CTCT X, Y, Z.Vit cc phng trnh phn ng xy ra.b. Tnh a?