nudc thi thu tlugc dung nghiQm dugc bi€u di6n.[r]
(1)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
(2)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