Đề thi HSG hóa tỉnh LA 2011

sd
cIAo
DVC vA
DAo
rAo
LOI\G AN
C TH
ri rru cHqN
Hec srNH cr6l
Lop
q
cAp
riNH
wION THr: n6l
Hqc
NGAY THI: 071
41
20ll
fHOl GIAN:150
pHi;r
fthhng
rc
tnn
giun phdt
ttL)
Ciu
1:
(2
di6m)
ut
4

V
,
Z
theo
thri
tg
ld
ba nguy0n t6 lien ti6p
trong bing tuAn
hoirn.
T6ng
sO
proton
cita
X,
Y
,
Z
Id2I.Xbc dinhX,
Y,Z(px<pv
<pz).
b/
Hqp chdt
e
duoc t4o boi hai
nguy6n t6 M ve Z co cdngthucMzZt,
trong
A
t6ng s6
hqtliL236.

Trong
h4t nh6n
M c6 n
-p:4,
cdn
trong
h4t
nh6n
Z
ca n'
:
p'.
Xdc dinhMzZt.
CAq
2:
(6
diem)
2.1)
ViCt
phuong
trinh
h6a hgc thgc hiQn so d0 chuydn
h6a sau:
A
*o,
>g
+ddNaoH,g
+ddNaoH,p +ddHcl
,B
*o,

>E
**tro
>F
*Cu
>B
Bitlt A
la thenh phAn chinh cua
qu{ng pirit
sdt.
2.2)Thdm
dan 100
ml dung dich
NaOH vio
25
ml
dung
dich AlClr
vira
du thu duoc lugng
k6t tria
cyc d4i I,872
gam.
alTinh
n6ng dQ mol cua m6i dung dich ban tldu.
b/
NOu
th6m
V
ml dung dfch NaOH trOn
vdo

25 mldung
dich
AlCl3 tr€n. Sau
phAn
img
thu dugc
lugng
k6t ttra bang 9110
lugng
k0t tria cgc dai. Tinh
V.
clT.3='Jl
dicm)
.A r i.i ,
.^
.,
\
3.1) Hai nguyOn t0 R
vd R'
ddu o th6 rdn trong di€u
ki6n thucrng,12
gayt
R c6 s6 mol
nhi6u hcm
s0
mol cua 6,4
gam
R'
le
0,3

mol. Bi0t
kh6i
luqng mol ctra R
nh6 hon kh6i lugng mol cria
R'
li
8.
a/ Hdy cho
bi6t
tOn cua R
vi
R'.
b/
Tinh ttrOi
luqng ch6t
rin
thu dugc khi nung n6ng h6n
hqp R vi
R'(trong m6i trudng
kh6ng c6
kh6ng khi).
3.2) Nung
m
(g)
hOn hqp
g6m
KMnOa
vd KC1O3 co cung sO
mol, ta thu duoc chAt ri.n
vi khi

02.
TrQn oxi
thu dugc o trOn vcri kh6ng khi trong binh
kin
thu
dugc
hdn hqp khi.
Cho
ti6p
v.do binh
19,2
garn
cacbon
rOi
AOt chdy
htit thu
dugc
h5n hcr-p
khi
g6m
hai khi trong d6 c6
COz
chi6m 40%
v0 thO
tich.
Tinh m.
Bi6t
kh6ng
khf chria 20oA
O2vi 80%

Nz
vd th,3 tich,
th6 tich c6c khi do o dktc.
Ciu
4:
(3
di6m)
MQt h6n
hqp X.gdm
C2Ya,
Hz vir chAt xric t6c
Ni
nung
n6ng, sau mQt thdi
gian
thi thu dugc
h6n
hqp khi
Y. BiCt
rdng ti
khdi
hoi cira X so
vdi
khi hiclro
1d7,5
vd ti khdi hcvi cua
Y so v6i khi hidro
ld
12.
CLc th0

tfch khi do <r
cirng di6u kiQn nhiet d0
vir 6p su6t,
al
Titlhthenh
phin
phAn
trf,m theo th€ tich
cic khi c6
trong h6n hq'p X,
Y.
b/
Trinh bdy
phuong phep
h6a hgc chung minh sU
c6 m{t ttmg
khi c6 trong
h6n hqp Y.
Cffu
5:
(a
didm)
Dung
dich axit
axetic
(
dung dich
A) c6
kh6i luqng
riOng ld 1,0

g/ml.
-
Cho
Vml dung dtch
A vdo 26,5
gam
dung dich
Na2CO320oh, tAo
thdnh 0,672lit
khi
(dktc)
vd
dung
dich B. Cho
B vio c6c chria 25,9
gam
dung
dich Ca(OH)z
l0o%, thu duoc 2
gam
k6t
ttra vi
dung dich C.
-
N6u
trung hda
V
ml dung
dich A bang NaOH
vira du

thu dugc 37,48
gam
nu6c.
a/ Tinh
n6ng dQ
mol
cria
dung dich
A.
b/ Tinh
n6ng
dQ
phdn
trdm c6c
ch6t c6 trong
dung
dich C.
HET
Chti
f:
Hoc sinh
duqc
ph6p
su dgng bing tuAn
hoirn
c6c
nguy6n td h6a
hgc.