Đề thi học sinh giỏi tỉnh toán 12 pot

sO
GD&DTPH1J YEN
Kl
THICHQN HQC SINH GI(:n
cAp
TINH
LOP 12 THPT NAM HQC 2009-2010.
THC1JGIAN: 180
PHUT
(khong
kd
thili gian philt (jJ)
thi
sinh: .
BD: .
(2,5 di~m)
a. Nguyen
tu
ella nguyen t6
X
co di~n h:;ttnhan bfu1g+41,652.10
cJ9
C; nguyen cua n,guyent6
Y
co kh6i lUQ'ngb~ng 1,794.1 0-22gam. Xae dinh
X, Y
va d1,ra.trencAu hinb electron, hay cho bi~t gi:ii
thfeh) muc hoa bell11h~t eua X va
Y
trong hqp ch§t?
b. Chq bi~t tf?ng thai

va
dS hoan thanh sa d6 sau
(18)
R~~ +CH
z
__ (2,0 di~m)
14,224gam iot 112gaIll bilfh l(lIldllng tich 1,12lit (}nhi~t dQ400°C. T6c
dQban d~u cua phan (rug Ia IIlQt~qi gia11"(athai di~m t) p6ng dQ cua la
0,04moI/Ht va khi phim img H2(k) + h(k) can bang thi nong dQ cua HI bang O,06mollIit.
a. Tiuh h~ng s6 t6e dQclm phim ling thu~n va phan U'ngnghieh.
b. T6e dQt:;tothanhHI
a
thai diSm tJabao.nhieu?
__C__
a¥~
4. (2,0di~m)
Nhi9t phan 104gam hQ'p X g6m A(N0
3
)2 va B(N03)2 (A la kim lo?i kiem th6, B Ia kim lo?i
ehuy~n ti~p) eho t&ikhi die phantmg XaYra gqantpan, thudu'Q'ech~t r~n
y
chI g6m .nhungoxit, .h6n hqp
khf Z g6m N02 va O
2
co tieh31 ,36lft.(do
a
OOC;latm) v&id
z
/
co

, Xae dinh cac kim lo:;tiA, B (bi6t
s6 mol CllaB(N0
3
)2 nhieu hO'ns6 mol cua A(N03)2).
__Ca__u__5. (3,0 diSm)
D6t chay hofm toan 3,24gam mQt clohidrocacbon X (m<;lchcacbon khong phan nbanh) bing lUQ'ilgoxi
du va cho t§t ca sim phftm chay (C0
2
, HCl va hO'iH
2
0) vao binh kin chlra 60cm
3
dung dich NaOH 20%
(kh6i Iuc;mgrieng d
=
1,22gam/cm
3
). Sau khi eac san ph~m chay duQ'c h~p hoan toan vao dung dich
NaOH, t~o thanh dung dich
Y
va xac dinh duQ'ckh6i luc;mgdung dich tang len 7,73gaI11.
Dung dich
Y
duQ'c pha loang bing nuoe cAtthanh 250em
3
, eli 20em
3
dung dich nay tac dl,mg vlra du
veri24,828cl1l
3

dung dich HCIl,O 15M.
a. Xac dinh cong thuc phan t11cua X.
b. Vi~t t~t ca cong thuc c~u t?O cae ch~t d6ng phan eua X, gQiten theo danh phap thay th~.
r.So sanh va giai thich v~n t~t nbi~t dQsoicua:pentan-
_C_a_u_2.(2,5
di~m)
B6 tuc dic
fu1
cMit, vi~t cae
(m6i mUiten chi vi6t 01 phUOTIgtrinh
(I) (2) (3)
C
2
H
s
OH ~ C4Ho >
A
B
i'i
F~
•.• ~. (12)(P)
L
11>-
M
11>-
trang 1/2
__~a __Au__
6.
(2,0 di~rn)
3.

Cho biStd<,1ng
hl5TIg
daY.Giai thich vik tit co sa cho sv IvachQn do.
a. Lysin HzN[CH2HCH(NH:~)COOH
~. Axit aspatic HOOC-CHz-CH(NHz)-COOH
1.
Arginin HzN-C(=NH)-NH[CI-IzhCl-I(NHz)~COOH
O.Tyrozin p-HO-C
6
H
4
-CH
z
-CH(NHD"'COOH
b. Cho bang cac gia tri h&ng s6di~n diSm d~ng,di~n>c1Ja m9t s6 cac amino axit duai day. ChQn
de tach cac ch~t tir m9t h6n hQ'Pgbm threonin, axit aspatic va tyrozin bfulg phuong phap di~n Giai
thich S1} h,rachQn do?
-,
~

-
_.~
-
Amino3xit
pKl pKl
pKj
pI
Threonin,
H3C-CH( OH)-CH(NHz)-COOH 2,09 9,10
5,60

-
-
Axit aspatic, HOOC-CHz-CH(NH2)-COOH 1,99 3,90
10,00 3,90

,.,,-
2,20 9,11 10,07
10,07
Tyrozin, p-HO-C6H4-CHz-· CH(NHz)-COOH

~-
-
'-
cua hai d<,1ngd6i quang CtlaX.
ViStcd chS phan (mg, viSt cong th(rc
san
phftn1
t1;lO
thanh.
~ __ag__~ __
7.
(3,0
diella)
H6n hQ'PX gbm mQt 10<,1iRvamu6i cacbonat
!uqt
tuang lmg,la 2:1). Hoa
tan hoan toan ?8,4gam h6n hQ'PX trong dung dich " du, thfiy thoat ra hon hQ'Pkhi Y gorn NO (san
ph~m khu duy nhfit) va COz. H6n khi
Y
lam mfitmau vua du 420ml dung dich KMn04 1,OMtrong

l-hS04{du)Iqang; khi con l:,1i(sau khi Yqu~d~ng dichKMn04) cho qua dung dich Ca(OH)z du th~y xu~t
hi~n m garn kSt tua, dbng thai kh6i 1ugng dung dich giam 16,8gam.
3.
Vi~t cac phuong phan ung xay ra duai d<,1ngionthugQn.
b. Xacdinhcong tl1uc mU6i,cacbonat cua va tinhthanh phlin phlin
trong h6n hQ'~ X.'
__~ __au
8. (3,0 diSm)
Hai hQ'Pchfit hUll co da chuc A va B d~u co cong thuc phan tu C
S
H
6
0
4
va Ia dbng phan l?p thS cua
nhau. Ca A, B d~u khong co Hnh quanw 49:,1t, co nhi~LdQ soi th~p hon B. A, B (l~u tac dvng vai
NaHC0
3
giaj phong khi COz.f;hLhidro hoa A hay B b&ng Hz vai xuc tac Ni dugc h6n hQ'PX, gbm cac
ch~t co cong thuc C
S
H
S
04. Co thb tach X th;1nl1haid~l1g 0;6iquang cuarillau.
lu~n xac dinh c~u t<,10,cfiu hinh cua A va B.
th(rc Fisher, gQi c~u
B lli111ugt tac
Fisher, gQi
theo kh6i lugng m6i ch~t
dU'9'cphep d1.Jng13dl1gtudnhoiinVdina)ltinhcdmtay (theo danh mljC may tinhB(J

GD&DT cho phep dljngtrong cacki thi qu6c gia).
HQva ten Giam thi 1: ; Chuky: ~ .
HQ
va ten
Giam th1 2: .
; ChftkY:· .

.
~

"
.
"
trang 2/2