đề thi HSG tỉnh 2017-2018

ri rnr

riNtt rH,lr NcuyEN
sd crAo DVc vA DAo rAo
UBND

Bt cuiNn rntlc

cHeN Hgc SINH cror

D
(r)

9

(Thdi gian ldm bdi 150 plrtu khdng kA thdi gian giao tI4)

I

s (,), A

LoP

NAvt Hoc 2or7-zor8
vt0N rrirr noA Hec

(4,0 tli6m)
1. Vi6tphuong trinh h6a hqc cta chc ph6n r?ng thUc hiQn

CAu

riits

(o),

scr dO

.G

E

:

A

, ,oy
\

bi€n h6a sau

(t)

rA

(6)>NaoH

2, C6 6 ch6t ran epg trong 6 19 ri6ng biet bi m6t nhan sau: Na2CO:, NazSOa, MgCO3,
BaCO3, BaSOa, CuSO+. Chi dugc dtng th6m mQt thudc thri, hdy nhQn bi6t c6c chdt rdn
tr€n bing phuong ph6p h6a hgc, vi6t phucrng trinh h6a hgc cria c6c phan img xiy ra.
Cin2 (4,0 di6m).
L. Hinh v€ minh hga sau'ddy dirng A6 OiCu chti vd

thu khi SO2 trong phdng thi nghiQm.

a. NOu t€n c6c dpng cp sri dgng ldm thi nghipm
trong hinh v6.

Vi6t phuong trinh h6a hgc cria 2 phhnimg tuong
img vdi c6c h6a chAt A, B.
c. NCu vai trd cta bdng tdm dung dich D, vitit
phucrng trinh h6a hgc minh hga.
d. Ldm thti ndo Ae Uit5t binh da dAv khi SOr?
e. Cho 2h6a chdt li dung dich H2SO+ dic vi CaO
U.

riin. H6a ch6t nao dugc dirng vd kh6ng dugc dung dC ldm khd khi SO2. Gi6i thich?
g. BO dung cp & tr6n cdn dugc dtrng e16 di€u chti khi hidroclorua. Vitit phuong trinh h6a
hqc minh hga.
2. BAng phucrng phrlp hoShAc 4ay t6ch ri6ng chc chdtNaCl, FeC13, AlCl3 ra kh6i h6n hg'p
3
. rr ^
r\
ldm thay d6i kh6i luqrng cria m6i ch6t. Vi6t rdn md khdng
cria cilc phin img xiy ra.

Ciu 3 (4,0 cli6m).
Hda tan het 27,6 gam h6n hqp

A

g6m R2SO3 vd RHSO3 (R

h kim loai) bdng dung dich

phin img hoan toan thu dugc tOi da V lit khi SO2 duy nfr6t lenc; va
dung dich X. Hap thu htit V lit kfii SO2 6 t€n vdo 200 rnl dung dfch chria hdn hgp g6m NaOH
1,5M vd KOH 0,5M, dung dich sau phdn img chria 30,08 gam ch6t tan. Cho 11,5 gam kim loai

R 0 tr6n vdo 400 ml dung dich HCI 1M thu du-o. c dung dich Y. Cho lugng du dung dfch AgNO3
vdo dung dich Y thi thu ducr. c m gam t6t tua. X6c dinh kim loAi R va gi6 fi cria rn, V.
CAu j (4,0 ili6m)
1. H6n hqp X gdm A1, Fe, Cu..Ldy 6,62 gam X cho vdo dung dich HCl du, thu dugc
1,568 lit H2 (dktc). M[t kh6c, n€u l6y 0,12 mol X tdc dung v6i khi clo du, dun n6ng thu
HzSO+ d{c n6ng du, sau


dugc 17,27 gam hdn hgp ch{t ran V. Bii5t c6c phan img x6y ra hodn todn, tfnh thdnh phdn
X vC ttrOi tuqttg ctr- cdc ch6t trong X.
2. Ngudi ta hda'tan hodn todn h6n hqrp NaOH vd Ba(OH)2 vdo nudc thi thu tlugc dung
dich X. Spc tir tu khi CO2 t6i du vdo dung dich X. Kiit qui thf nghiQm dugc bi€u di6n

tr6n d6 th! sau:
56 mol BaCOg

A

0r4a a

x

D

Sr5

mot coz

a. N6u hiQn tuqng xhy rctrong thi nghiQm vd vitit phucrng trinh h6a hgc cria c6c ph6n ring
xtry ru.

b. X6c dinh gi6

tri cria a vd x trong AO tfri.

fiFri t[li#:*icn vd chc chdtvd co cAn thitit (c6c ili6u kiQn kh6c coi nhu c6 dt), vii5t
trinh h6a hgc cria c6c phan r?ng diAu chi5 po[etilen, poli(vinylclorua),

polibutadien.
,,
(chria
toan bQ s6n phdm ch6y
phucrng

i.g,Otch6y hoan todn 12 gam mQt chAt hnu co A

C, H, O),

thu dugc dem h6p thu htit vdo dung dich Ca(OH)2 thu dugc 20 gamk€t tua vd dung dich
B, ddng thdi th6y ktrOi tuqng du1re dich Ca(OH)2tdng 4,8 gam. Dun n6ng e Af.$1qla.l

ung ki5t thric thu tlugc 10 gam k6t tua nta. X6c dinh cdng thric phdn tu cria A, bi0t ti kh6i
cria A so vdi metan 1d3,75.

ri6t

Nrf:

CF35,5; H=1; N-14; 0=16; C-12; 1ll-27iBa=137; Fe=56; Na=23;
Mg=24; Ca =40; Cu:64, Ag=108.

(Hgc sinh kh6ng ctuqc sfc dttng

tdt *i tdi liQu ndo. Gitim th! coi thi khing girti ftfch gi thhm).