THI KIM TRA NNG LC MN HA HC
THI KIM TRA NNG LC MN HA HC Thi gian lm bi: 150 pht
Cu 1 ( 3 im)1. ng ch hy nu quyn ca gio vin theo quy nh ca iu l
trng THCS, THPT v trng PT c nhiu cp hc ( ban hnh theo thng t s
12/2011/TT-BGD T ngy 23/8/2011 ca b GD T)2. Hy nu chun kin thc k
nng khi dy bi axit nitric trong bi axit nitric v mui nitrat ( SGK
ha hc 11)Cu 2 ( 3 im)1. C 5 dung dch ring bit: MgCl2, BaCl2, ZnCl2,
AlCl3, FeCl3. Vit cc phng trnh ha hc khi ln lt thm mi dung dch trn
tng dung dch sau y:a. Dung dch NaHCO3 un nng ngui.
b. dung dch Na2Sc. dung dch NH3.2. Cho cc cht: N2, axeton, HF,
NH3, CH3Cl, imetyl ete, glyxin. C bao nhiu cht to c lin kt hidro vi
nc? Hy biu din cc lin kt .3. Vit cng thc cc hp cht bn, mch h c cng
thc phn t C4H10O.4. Trong dy hc ha hc, mt gio vin ni: phng php
chung iu ch mui cacbonat ca kim loi nhm IIA l cho dung dch cha ion
KL ny tc dng vi dung dch mui cacbonat ng ch hy nu nhn xt v kin trn
( phn tch ng sai v cho v d minh ha)Cu 3 ( 2 im)
1. Ha tan 6,58 gam hp cht v c A vo 100 gam H2O thu c dung dch B
cha 1 cht tan duy nht. Cho mt lng mui BaCl2 khan vo B thy to 4,66
gam kt ta trng, lc b kt ta thu c dung dch C. Cho mt lng Zn d vo C
thy thot ra 1,792 lt kh H2 ( ktc) cn li dung dch D. Cc phn ng xy ra
hon ton.a. xc nh cng thc phn t ca cht A.b. Tnh nng % ca cc cht tan
trong dung dch D.2. Hy gii bi ton sau bng hai cch
Cho 14,4 gam hn hp Fe, Mg, Cu ( s mol cc kim loi bng nhau) tc
dng ht vi HNO3 thu c dung dch X v 2,688 lt kh ( ktc) gm: N2, NO,
N2O, NO2 trong 2 kh N2 v NO2 c s mol bng nhau. C cn cn thn dung dch
X thu c 58,8 gam mui khan. Tm s mol HNO3 phn ng. Bit rng cc phn ng
xy ra hon ton.Cu 4 ( 2 im)1. Cho 9,1 gam X gm 2 hidrocacbon mch h
CxH2x v CyH2y lm mt mu va ht 40 gam brom trong dung dch. Xc nh cng
thc ca 2 hidrocacbon . Bit rng trong X thnh phn th tch ca cht c phn
t khi nh hn nm trong khong t 65% n 75%2. t chy hon ton 4,3 gam mt
hp cht hu c X thu c hn hp kh ch c CO2, H2O v HCl. Dn kh ny vo bnh
ng dung dch AgNO3 d c mt HNO3 0oC thu c 5,74 gam kt ta v khi lng
bnh ng dung dch AgNO3 tng 2,54 gam. Dn kh thot ra khi bnh AgNO3 vo
5 lt dung dch Ca(OH)2 0,02M thy xut hin kt ta, lc b kt ta, dung dch
cn li em tc dng vi dung dch Ba(OH)2 d li thy xut hin thm kt ta, tng
kt ta hai th nghim l 13,94 gam. Cc phn ng u xy ra hon ton.a. Tm
CTPT ca X bit MX < 230 gam/molb. A, B, D l ng phn ca X tha mn iu
kin sau:
- 43 gam A + NaOH d 12,4 gam C2H4(OH)2 + 0,4 mol mt mui A2 +
NaCl- B + NaOH d mt mui B1 + CH3CHO + NaCl + H2O- D + NaOH d mt mui
D1 + CH3COONa + NaCl + H2OHy tm CTCT ca A, B, D. Bit rng A, B c cu
trc i xng. D lm giy qu m.
