đề thi sinh giỏi hóa lớp 9đề 1

(t
so crAo nuc
t.

v.q. oAo
BE]Y TRE

r.to

op

rur

rrQC sIMr cror Lo? 9 TRUNG HQC CO SO
NAnr Hoc 2013-2014
M6n: H6A IIQC
Thd'i gian:150 phrit (kh6ng IiO ph:it tld)

Ciu I 1r,O Oi6m;
Cho so d0 bi6n hda sau;

l.

(Xr) +

(X,

Ct2

+

H2O + ...

-L+ HCl + HzSOa
2. (X:) + (&) + (Xs)__+
3. (Al)+ (A2) + SOz + HzO
4. (Br) + Gz) + (Br) + Cl2 + MnSOa + K2SOa+Na2SO4 +Hzo
5. NaHCO: + dung dfch Ca(OH)2 du + (Dr) + (D2) + (D3)
6. BaO + NaHSOq (dung dich) -+ (Er) + (E2) + (E3)
Vi6t c6c phuong trinh ph6n ring phu hqp v6i so dd trOn

Cflu2(2,0iliOm)

Hdn hqp khi A g6m SO2 vi 02 c6 ti kh6i so voi He ld 10.
Tinh thanh phAn % th6 tich cira hdn hqp A.
2. CAn thom bio nhi6u lit oz vio 20 lit h6; hqp A ad n6n

l.

H2

bing

hcr-p

18,67.

thu dusc c6 ti kh6i so vcri

C6c khi do o cung didu ki6n nhiet dO vd 6p su6t.

CAu3(3,0tli6m)
chi dtrng th6m phenolphtalein, hey phdn biQt c6c mdt nhari chria c6c dung dich ri6ng
J9
bi€t sau: NaHSOa, K2CO3, Alclj;FeCl3, KCl, Ca(NOl)2.

Ciu4(2,0ili6m)

Thirc hiQnphdn img cQng hgp axetilen (CzHz) o didu kiQn nhiQt dQ, xrio tric thich
hqrp; sau
phan img chi thu elugc vinylaxetilen (C+rI+) vd axetiien chua piran
,irrg. ii f.f,ai ,iu f,a; ;q; il;
dugc sau phan ring so v6i

NO

h

vinylaxetilen.

13/9. Tinh htQu su6t cria phan,:mg"cnuyen h6a axetilen thanh

Cflu5(3,5tli6m)
Hod tan 11,6 gam h6n hqp z mu6i cacbonat vi sunfit cua cung kim lo4i kiAm
R) trong
dung dich HCI du. Lusng khf sinh ra dugc
thp
t6i
tnieu
bdi
100

d,rng
a1"n
NuciH
tpM:
fdp
X6c dinh R vA tinh thenh phAn phAn tram kh6i luqng m6i mu6i trong rr6n rrgp"uan ;tr. -

*l

Ciu6(

3,0di6m)

Cho hidrocacbon mpch hs X t6c dung vua du voi nuoc brom,'thu duoc chAt hfru cs
ttroi trsi ctra Y so vdi oxi ld 6,75.xdcdinh c-one thirc phdn
ctra X.

ttr;;iaj;;;;#.

y. Ti

.d";;dd;;

CiuT(3,5di6m)
2,74. gam h6n hqp A g6m Al, Fe t6c dqng vira du v6i 2,68g lit
khi clo (dktc). L6y stn
.
,Cho
pham thu duoc hda tan vAo nudc r6i cho t6c dpng rOi Vml dung
dich KOH lM. Tfnh gi6 tri cua

e
V di5 lugng kdt tria sinir ra Uat AAu kh6ng d6i.

i

I

:

Cho: H=1 ; C:12; N:14; O:16; S:32; Cl:35,5; Br:g0; I:127; Fe 56; Cu:
64; Ca
7; Na :23;K = 39; Rb 85; Cr = 52; Mg = 24; Zn: 65; Ba ill;Ag:l0g

27;Li:

:

----u6t-

:

: 40; Al :


so crrio D[.rc vA DAo TAo
I}I|N TIIII

rrrIoNG oAN cnAna
srNn cr6r LoP 9
Tri.uNG Irec co so cAr riirrl

on

rru rrec

Nrim hoc 2013 -2014
MOn: IIOA IIOC

Ciu
1

(3,0)

Ndi duns

Cl, + zHzo + MnClz
+ 2HCl+H2SOa
-J-+ 2SO2 + 2IlzO

-l-)

MnO2 + 4HCl
Cl2+ 2H2O +SOz
2

H2S

+ 3Oz

l0 KCI + 2I(MnO+ + 16 NaI-ISOa -+ 5Cl2 + 2MnSOa + 6KzSO+ +
8NarSO, + 8H,O

NaHCO, + Ca(OFD., du -+ NaOH + C
+ HrO
BaO + 2NaHSOa
.,

(2,0)

+

BaSOa+ Na2SO4 + H2O

Ei6m
0,5
0,5
0,5

0,5
0,5
0,5

1. Thdnh phdn oZ cira

64

a+32 (1-a):4x10:40

0,5

--)a:8132:0,25

%V SO2:0,25 x 100 :25Yo

YoY

Oz: 100 -

:

25 :

7 5o/o

40 x20 + 32Y (20 + Y) xZx 18,67
-10 (lit)
Trich mAu thu cho mdi l6.n thi nghi6m:
- Cho phenolphtalein vdo m6i m5u thu. Mdu thir c6 mdu hdng ld dung dfch
KzCO:, c6c m5u thir cdn lai khdng mdu..

V:

3

(3,0)

KzCOr+ HzO ?+ KHCO3+ KOH
- Dung I(zCOr liun thu6c thu'cdc rn6u cdn lai:
MAu thu'c6 siri bot khi khdng mdu ln NaHSO+
KzCO; + 2NaHSO++ KzSO++Na2SO4 + H2O + COz
M5r-r tirtr tao k6t tua tring keo vi sui bgt khi kh6ng mdu li AlCl:
3I(zCO,: +2AlCl3+ 3HzO -+ 2A1(OH)3}+ 3COz1 + 6KCl

MIu thu t4o kdt ttra do ndu vh srii bgt khi kh6ng mdu ll FeCl:
3KzCO: + 2 FeCl3 + 3HzO + 2Fe(OH)3J+ 6KCl + 3COzt
Miu thu tao ktit tira tring ld CaQ..lO3)2
KzCOr + CaG.JO:)z-+ CaCOTJ + 2KNO3
MAu tliiL kirdng co hi6n tuo-ng la KCl.
4

(2,0)

2 ClIz-"+ C,tI,,
2x (mol) x (m0l)
30x13/9:26 : (1-x)
x --,4,4 (mol)
Hi0u sr-rdt phin tlng: FI:2x0,4 x 100:80%

0,25
0,25
0,5
0,5

0,5

0,5
0,5

0,5
0,5
0.5
0,5
0,5

0,5
0,5


\.
'1.

I

0 ?5

RzCO: + 2HCl-+ 2RC1+ HzO + COz
RzSOs + 2HCl+ 2RCl + H2O + SO2
COz + NaOH ---) NaHCO3
SO, + NaOH
NaHSO3

5

(3,5)

0 ?5
o ?5
0 ?5

-+

nhh : nNaOH : 0,1 (mol)
Ta c6: 2R + 60 < 11,6: 0,1 <2R + 80
--- ( 1 1 6-80):2

---+ 18Vay R la Na (Na:23)
N6u ld mu6i axit:
RHCO3 + HCI-+ RCI + HzO + COz
RHSO: + HCI-+ RCI + HzO + SOz
R + 61 < 11,6: 0,1 --, (116-81)< R <116-61
'
---) 35
0,25
0,25

0 ?5
0,25

0,25
0,25

VAvRldK(K:39)
Ta c6: 106 x + 126

x+y

y:

11,6

:0,1

x:Y=0'05

:

45,68oh

0,25
0,25

ll,6:

17,24Yo

0,25
0.25
0,5

%m NazCO3= 106 x 0,05 x 100: 1 1,6
%m NazSOr: 100 - 45,68 :54,32Yo

Tac6: 100x+120y:11,6

x+y

x:0,02;

:0,1

y:

0,08

%m KHCO3: i00 x 0,02 x 100:
%m KHSOr 120 - 17,24:82,760
6

(3,0)

-,
:
, Khi z: | -- l2x+ y:216 - 160 :
:
QTPT: C+Hn

CrHrBt2,
C*H, + zBr2
Ta c6: l2x + y + 802 6,7 5 x32: 216

05
56

05
* )-

.i

--a
z:z
-l2x+y<0
CTCT: CH: _ CH:CH-CH3

0,5

;

0,5
0,5

CH:
CH:

7

(3,5)

- CH2-CH:CHzi
,
- CH (CH: ):CHz
' 2Al + 3Cl2 ---+ 2AlCl3
2Fe + 3Cl2 -+ 2FeCl3

(1)
(2)
(3)
(4)

FeCl3 +3KOH-,2Fe(OH)3 + 3 KCt
AlCl3 +3I(OH-*A1(OH)3 + 3 KCI
AI(OH)3 + I(OH+ KAIO2 + 2HzO (5)
Ta co: 27x + 56 y :2,74

1,5 x + 1,5 y: 2,688122,4:0,12
Gidi lrQ:

x:

0,06;

y:0,02

0,25
0,25
0,25
0,25
0,5
0,25
0 ?5
0 ?5


'{

^E

{

Lr-rong kdt tira irXt AAu kh6ng d6i

khi Fe(OH)3,
tan h6t trong bazo
nI(OH 3(x+y) -f x 0,3 (mol)

0,3: 1 0,3 (l) 300m1

totin; sau d6

:

V:

Al(OFI)j

:

:
:

A(OA,

k0t tta h6t hodn

0,25
0,5
0,5

Hpc sinlr cd tht trinh bdy phwons phdp khric so vdi hu6'ng ctiln chdm, n\u hqp
tj, vfrn clto ctfi iti€m.
Ctic pltdn tiLtg thi\u diiu ki\n, chwa cdn bing, cdn bing sai: trir l/2 sO efiAm cua
pharr ftng dd.

_

-

-Hiit-