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B GIO DC V O TO CNG HA X HI CH NGHA VIT NAMTRNG I HC S PHM H NI c lp T do Hnh phc

(Dng cho th sinh thi vo lp chuynHa hc)

Thi gian lm bi: 120 pht

CHNH THC

THI TUYN SINHVO TRNG TRUNG HC PH THNG CHUYN NM 2011

Mn thi: HA HC

Cu I

1. Ha tan mt oxit st vo dung dch H 2SO4 (long, d), c dung dch X. Dung dch X

c kh nng lm mt mu nc brom, lm mt mu dung dch thuc tm v ha tan c

bt ng.

a. Xc nh cng thc oxit st v vit cc phng trnh phn ng xy ra.

b. Vit ccphng trnh phn ng khi cho oxit st tc dng vi dung dch HNO 3 long

(to kh NO), vi dung dch H2SO4c nng.

2. Hn hp Y gm CuO v Fe2O3. Ch dng thm dung dch HCl v bt Al, nu 3 cch

tch ly Cu kim loi t hn hp Y (cc iu kin v phng tin cn thit c ).

3. Cho BaO vo dung dch H 2SO4 (long), sau khi phn ng kt thc thu c kt ta A v

dung dch cht B (c kh nng to kt ta vi CO2). Cho bt Al d vo dung dch B thu

c kh E v dung dch cht D. Ly dung dch D cho tc dng vi dung dch Na 2CO3 thu

c kt ta F. Xc nh cng thc A, B, D, E, F. Vit cc phng trnh phn ng xy ra.

Cu II

1. Hp cht hu c A (to nn t C, H, O) c mch cacbon khng phn nhnh, ch cha mt

loi nhm chc trong phn t v c phn t khi l 144 vC. Cho 14,4 gam A tc dng va

vi 100 ml dung dch NaOH 2M, thu c hn hp gm mt mui v mt ru vi c

im s nguyn t cacbon trong hai gc hircacbon bng nhau.

Xc nh cng thc cu to ca A.

2. Hn hp kh X ( iu kin thng) gm mt ankan A (CmH2m+2) v mt anken B

(CnH2n). T khi hi ca anken so vi ankan l 2,625.

a. Tm cng thc ca hai hircacbon.

b. Vit cc phng trnh phn ng iu ch A t B, c dng thm cc cht v c v iu

kin cn thit.

THI GM02 TRANG

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Cu III

1. Mt hn hp A gm Na v Al.

- Cho m gam A vo mt lng d H 2O thu c 1,344 lt kh, dung dch B v phn khng

tan C.

- Cho 2m gam A tc dng vi dung dch NaOH d thu c 20,832 lt kh.

Cc phn ng u xy ra hon ton, cc th tch kh o iu kin tiu chun.

a. Tnh khi lng tng kim loi trong m gam A.

b. Cho 50 ml dung dch HCl vo dung dch B. Sau khi phn ng kt thc, thu c 0,78

gam kt ta. Xc nh nng mol/lt ca dung dch HCl dng.

2. Trn CuO vi oxit kim loi M (ha tr II khng i) theo t l s mol 1: 2 c hn hp

A. Cho mt lung kh CO nng (d) i qua 1,2 gam A n phn ng hon to n, thu ccht rn B. ha tan ht B cn 50ml dung dch HNO3 1M, thu c dung dch C ch cha

mui ca 2 kim loi v V lt kh NO duy nht ( ktc).

Xc nh kim loi M v tnh V.

Cho: H = 1; C = 12; O = 16; Na = 23; Mg = 24; S = 32; Cl = 35,5; Ca = 40; Fe = 56

Cu IV

1. Cho 728 ml hn hp kh A gm 2 hirocacbon mch h i qua m t lng d dung dch

Br2 th c 448 ml kh thot ra; lng Br 2 phn ng l 2 gam. Nu t chy hon ton

1456 ml hn hp A, sau hp th ton b sn phm chy vo 1000 gam dung dchCa(OH)2 x% th thu c 7,5 gam kt ta. Lc tch kt ta, khi un nng phn nc lc th

thu c thm ti a 4 gam kt ta na. Bit th tch cc kh o iu kin tiu chun , cc

phn ng xy ra hon ton.

Tm x v xc nh cng thc phn t ca 2 hirocacbon trong hn hp A.

2. t chy hon ton 27,4 cm3 hn hp kh B gm CH4, C3H8v CO thu c 51,4 cm3

CO2.

a. Tnh thnh phn % v th tch ca prpan trong hn hp B.

b. Hi 1 lt hn hp B nng hay nh hn 1 lt N2?

(Cc kh c o cng iu kin nhit , p sut)

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Cu = 64; Zn = 65; Br = 80; Ba = 137.

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Ghi ch: Cn b coi thi khng gii thch g thm.

H v tn th sinh: .. S bo danh: .