ĐỀ THI HÓA HỌC

nudc thi thu tlugc dung nghiQm dugc bi€u di6n.[r]

UBND

riNtt

rH,lr

NcuyEN

sd

crAo

DVc

vA

DAo

rAo

Bt

cuiNn

rntlc

ri

rnr

cHeN

Hgc

SINH

cror

riits

LoP

NAvt

Hoc

2or7-zor8 vt0N

rrirr

noA

Hec

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

CAu

I

(4,0 tli6m)

1 Vi6tphuong trinh h6a hqc cta chc ph6n r?ng thUc hiQn scr dO bi€n h6a sau :

D

(o),

A

s

(,),

A

(r)

,

,oy

.G

(t)

rA

\

E

(6)>NaoH

2, C6 ch6t ran

epg

trong 19 ri6ng biet bi m6t nhan sau: Na2CO:, NazSOa, MgCO3, BaCO3, BaSOa, CuSỢ 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 SO2 phdng thi nghiQm

a NOu t€n c6c dpng cp sri dgng ldm

thi

nghipm hinh v6

U Vi6t phuong trinh h6a hgc cria 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 SOr?

e Cho 2h6a chdt

li

dung dich H2SO+

dic

vi

CaO

riin H6a ch6t nao dugc dirng vd kh6ng dugc dung dC ldm khd SO2 Gi6i thich?

g BO dung cp & tr6n cdn dugc dtrng e16 di€u chti hidroclorua Vitit phuong trinh h6a

hqc minh hga

2 BAng phucrng phrlp hoShAc 4ay t6ch ri6ng chc chdtNaCl, FeC13, AlCl3 kh6i h6n hg'p r r ^ r\

rdn md khdng ldm thay d6i kh6i luqrng cria m6i ch6t Vi6t <ldy dti phucrng trinh h6a hgc

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

HzSO+ d{c n6ng du, sau phin img hoan toan thu dugc tOi da V lit SO2 nfr6t lenc; va

dung dich X Hap thu htit V lit kfii SO2 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 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

dugc 17,27 gam hdn hgp ch{t ran V Bii5t c6c phan img x6y hodn todn, tfnh thdnh phdn

X

vC ttrOi tuqttg ctr- cdc ch6t X

2 Ngudi ta hda'tan hodn todn h6n hqrp NaOH vd Ba(OH)2 vdo

dich

X

Spc

tir tu

khi

CO2 t6i du vdo dung dich

X

Kiit

qui

thf

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 AO tfri

fiFri

t[li#:*icn

vd

chc chdtvd co cAn thitit (c6c ili6u kiQn kh6c coi nhu c6

dt),

vii5t

phucrng

trinh

h6a hgc

cria

c6c

phan

r?ng

diAu

chi5

po[etilen,

poli(vinylclorua),

polibutadien

,

,

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

A

(chria C, H, O), toan bQ s6n phdm ch6y

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