7/29/2019 HSG ha CVA
1/1
S GD& T H NI THI MNHO HC LP 10TRNG THPT CHU VN AN THI CHNH
THCK THI HC SINH GII NM HC 2010-2011---
Thi gian lm bi: 90 pht, khng k thi gian giao .
thi gm 1 trang.
(Hc sinhkhng cs dng bng tun hon cc nguyn t ha hc v bng tnh
tan)
Cho bit: H=1; N= 14; O =16; F=19; S=32; Cl=35,5; Br=80; I=127;
Na=23; Mg=24; Ag = 108.
Cu I(8,0 im)
1. Hon thnh cc phng trnh ha hc sau: 1. .. FeCl2 + I2 2. CaOCl2 +
CO2 + ? CaCO3 + 3. KI + .. KOH + I2 4. SiO2 + CaF2 + H2SO4 c CaSO4
+
Ch : k hiu ? l 1 ha cht, k hiu +. l thm t nht mt ha cht, k hiu .
l c ththm ha cht hoc khng.
1. Cn bng phng trnh cc phn ng oxi ha - kh sau theo phng php thng
bng electron:1. K2SO3 + KMnO4 + KHSO4 K2SO4 + MnSO4 + H2O2. Cu2FeSx
+ O2 Cu2O + Fe3O4 + SO2
Cu II(2,0 im)Se v Te l 2 nguyn t trong nhm oxi. Em hy nud onv mt
hoc mt vi tnh cht vt l hay tnhcht ha hc m Ag2Se v Ag2Tec th cv cho
bit em da vo c s no a ra d on camnh.
Cu III(4,0 im)C mt loi mui n c ln mt lng nh tp cht gm a mol
Na2SO4, b mol NaBr, 2a mol BaCl2. Trnh byphng php ha hc thu c NaCl
tinh khit.
Cu IV(6,0 im)X, Y l hai halogen hai chu k k tip nhau trong bng
tun hon cc nguyn t ha hc. em ha tan hon ton 60,025 gam hn hp A gm 2
mui NaX v NaY vo nc ri trn ln dung dch nyvi V lt dung dch AgNO3
2,0M. Khuy tht k cc phn ng xy ra hon ton ri li dn t t kh H2S
quadung dch trong bnh phn ng ny. Kt qu: th tch kh thot ra sau khi
li qua dung dch gim i mt 0,56lt (o ktc) v trong bnh xut hin thm kt
ta mu en ca mui Ag2S. Ton b cc cht rn kt tatrong bnh c lc ra, lm
kh, ri cn th c khi lng 146,975 gam. Tnh V v khi lng mi mui tronghn
hp A?
