lnron = ^r _1,7 lnro, - zlluzcot 1 "' 'r'i, ; j ^ 7,28 2'8,97 l*r*:ffi l- , *n - 2M +60 I u =n 1xy lrcqox = 7rro, = 0,13 = )' gdm 1 iifr o. lnrr.ror=0,065 l-=;:-=-[ 0,03 nol = my = 0,1.(R+83)+0,03.56 = 12,88 + R=29.\----VJ c2Hs-
fhi dOt chdy Y, C trong CzHsCOOK chuyi5n
h6t vdo KzCO: vd COz. Theo bio toin
nguy6n t6 C,tac6
3 nrrrrroo* = llce, l Tlrzcot
\------vJ \---vJ
0,1 ? o,oos
> ncoz =0,235 mol,Vgo,(dktc) = 5,264 lit. Dip inA.
*Thi dU 7. Th[ry phdn khdng hodn todn agam tetrapeptit Gly-Ala-Gly-Val trong m,i gam tetrapeptit Gly-Ala-Gly-Val trong m,i
trud'ng axit, thu duqtc 0,2 mol Gly-Ala, 0,3
mol Gly-Va\,0,3 mol Ala vd m gam hdn hqp 2
amino axit Gly vd Val. Gia tri cua m la :
A" 57,2. 8.82,1. C. 60,9. D.65,2.(Di thi thu Dqi hpc lin I - THPT Hitng Vwong - (Di thi thu Dqi hpc lin I - THPT Hitng Vwong -
Phil Thp, ndm hpc 2013 - 2014) Htdng ddn gidi
Theo gii thi€t vd sir dpng bio todn nh6m Ala,Gly vd Val, ta c6 : Gly vd Val, ta c6 :
frGly-Alo-Gty-V4 = ltcly-Ato * n11o,= 0r5
\-J L\-J
^, 0,3
t7 61, * ll 61, - 1 t o * 71 c ty -Vrl = 2 fl GU -,lt o - Gty -yol
q,J s--v.J \----vJ \-J
? 0,2 0,3 0,5
llyol i f16ry-yot : fl GU- Ata-Gty-yot
. 0,1 0,5 lro, = 0,5, nyol = 0.2 ) 1m,o*.vo11:0,5.75+0,2'll7 = 60,9 gam t-"- | 'ct, m val Ddp 6n C.
*Thi du 8. D,5t chdy hodn todn 0,02 mol
tripeptit X tao thdnh tii amino axit mqch hd A
co chtba m\t nh6m -COOH va m|t
nhom -NHz, thu daq'c 4,A32 Ut CO2 (dktc) vd
3,06 gam H2O. Thiry phdn hodn todn m gam
X trong 100 ml dung dich \aO,H 2M, r6i c6
can thu duqc 16,52 gam chdt rdn. Gia tri cita
mld:
A.7,56. B. 6,93. C. 5,67 . D.9,24. (Di thi thu Dqi hpc lin 1 - THPT chuyAn
Nguydn Hu€ - Hd N6i, ndrn hpc 2013 *2014)
Hudng dAn gidi
D{t c6ng thrtc cria tripeptit
x ld, c,HyooNr.
Theo bio todn nguy6nt1 C vir H, ta c6 :
l*.r"rrroor, = rlcoz
,L-J
I ---il;- ?G- ^ fx:e; y =17
)!.rr,nroort =2!uzo-- 1x ld ceHno4N3
l. --;E- ;t
Suy ra amino axit li H2NCH(Cru)COOH. Trong ph6n img thriy phdn hodn todn X bing
dung dich NaOH, sau d6 c6 c4n dung dich ttri
chSl rdn thu tlugc h murii
HyNCH(Cru)COONa (hay c6 c6ng thric ph6n
tir ld C3H6OzNNa) vd c6 th6 con NaOH du.Theo b6o toan nguydn ti5 Na vd gi6 thitit, ta c6 : Theo b6o toan nguydn ti5 Na vd gi6 thitit, ta c6 :
InrroUrrrr, I /?NoOu dt = flNoOH m =0r2
llllnsrH.o2^,po + 40n 1sos11 au :16,52
) ficsnsoz.r1No = 0,12 mol nyos11 a,r = 0,08 mol.
Theo bio toin nguy6nt6 C,ta co :
gttcsrutoqM = 3nqn6o2wo : 3.0,12 : 0, 36 (mol) + ncsHljo1q = 0,04 mol = mx =9,24 gam.
Ditp 6n D. 3. BAr r*p vAu DUNG
1. Cho 224,001it metan (dktc) qua hO quang diQn, thu dugc V lit h5n hqp X (dktc) chria
I2o/o CzHz; I0o/o CH,,; 78o/o Hz (vC th6 tich). Gi6 sri chi x6y ra2 phinimg:
2CHo,-+CzHz + 3Hz (1)
CHq -+ C + 2Hz Q)Gi6trf cuavld: Gi6trf cuavld:
A.407,27. B. 448,00. C. 520,18.D.472,64.
Diry 6n A.
2. Nung 8,13 gam h6n hqp X g6m hai mu6i
natri cua 2 axit cacboxylic (mQt axit tlon chfc vd mQt axit hai chfc) v6i v6i t6i xrit du, thu
<lugc 1,68 lit khi metan (dktc). Hly cho bitit
n6u dot ch6y hodn todn h6n hqp Xbing oxi thi thu dugc bao nhi6u gam Na2CO3 ?
A.5,565 gam. 8.6,36 gam.
C.4,77 gan. D.3,975 gam.
(Oi thi thri Dqi hpc lin I - THPT chuyAn Nguydn Hu€ - Hd NQi, ndm hpc 2013 -2014)
Ddp 6nA.
l. Edt ch6y hoin todn h6n.hqp hai ancol da
chric ctng dey d6ng ding cAn vua dt V lit 02
(ri ttktc). Sqc s6n phAm ch6y vio dung dichnudc v6i trong du. Sau ph6n img thu dugc 8 nudc v6i trong du. Sau ph6n img thu dugc 8
gam k6t tua vd ktrOi luqng du.ne dich gihm2,5
gam so v6i dung dich ban ddu. Gi6 fr cua V
li:
A.2,688lit.c.3,024tit. c.3,024tit.
8.2,240Lit.D.2,352Lit. D.2,352Lit.
(Di thi thu Dqi hoc lin 2 - THPT YAn Lsc - Wnh Phtic, ndm hpc Z0l3 -2014) Edp 5nD. 4. H6n hW M gdm axit axetic vd andehit X.
OOt ch6y hodn toin m gam M c6"n dirng vta
dt 0,13 mol 02, sinh ra 0,1 mol COz vd
0,1 mol HzO. Cho todn b0 lugng M frln vdo
.:r n6ng, sau khi k6t thric cilc phitn img thu
tlugc 0,04 mol Ag. COng thric ctlaXld:
6. X liL mQt tetrapeptit c6u tpo tu m6t amino
axit (A) no, mach ho c6 1 nh6m {OOH;
1 nh6m -NH2. Trong A %N: l5,73oA 1ve mrOi
luqng). Thriy phdn m gamXtrong m6i trudng
axit thu dugc 41,58 gam tripeptit;25,6 gamrlipeptit vd92,56 gamA. Gi6 tri ci,€ mld'. rlipeptit vd92,56 gamA. Gi6 tri ci,€ mld'. A. C3H7CHO.
C. CHTCHO.
B. HCHO.
D. C2H5CHO.
(Di thi thie Dqi hpc ldn | * Trwdng THPT Chuy€n -
Dqi hpc Vinh, ndm hpc 2013 - 2014)
DLp 6nA. 5. Dun n6ng 0,1 mol este no, dcrn chric E vdi 30 ml dung dich 28% (D: 1,2 glml) cira m6t
hidroxit kim loai ki6m M. Sau khi k6t thricphin img xd phdng ho6, c6 cpn dung dfch thi phin img xd phdng ho6, c6 cpn dung dfch thi thu ilugc chdt rin A vit 4,6 gam ancol ,4. O5t
chdy chiltrln A thl thu dugc 12,42 gammtbi
cacbonat, 8,26 gan h6n hgp COz vd hoi
nu6c. T6n ggi ctra E ld :
A. metyl fomat. B. etyl fomat. C. etyl axetat. D. metyl propionat.
(Di thi th* Dei hpc ldn | * THPT YAn Lqc - Wnh
Philc, ndm hpc 2013 - 2014)
Ddp 6n C.
(pi thi thu Dqi hgc lin I - THPT YAn Lqc - Wnh
Phuc, ndm hpc 2013 -2014) DLp 6nB. 7. MQt tripeptit no, mpch hb X c6 c6ng thfc
phdn ru C*HyO6Na. O6t cnay hodn todn 0,1
mol X, thu dugc 26,88 lit CO2 (clktc) vd z
gam H2O. Gi6 tri cua m ld :
A. 19,80.B. i8,90. C. 18,00. D.21,60.(Di thi th* Dqi hpc lin l.* THPT chuy€n KHTN (Di thi th* Dqi hpc lin l.* THPT chuy€n KHTN
Hu6, ndm hpc 2013 - 2014) Diry 6nA. A. 159 gam. C. 161 gam. 8.143,45 gam. D.141,74 gam. BrNH LUAN ...
(Ti€p theo trang 20)
Khi d6 ta tl6 dua dugc vd dang hdrm s5 theo
mQt bi6n / = S + x. Ddy cflng ld loi gi6i trong
Ddp 6n chinh thric. So di ta t6ch dugc o budc
(2) vi kni thay bQ di6m roi vdo thi gi6 tri bi6u
thric P chinh ld g(r) cdn bitiu thric con l4i bf triQt ti6u n6n ta tim c6ch chimg minh bi6u
thric d6 kh6ng duong b[ng c6ch chimg minh
ph|n t* sd cua n6 kh6ng duong ttrc f (x)<O
dC dua ve hdm s6 mOt bitin r.
*Bni luyQn tfp
1. Cho c6c sti thgc khdng dm x,y thay d6i
th6a mdn <tiAu kiQn [- t +
'fi] - x* !.
Tim gi6 tri nh6 nh6t cira bi6u thric
n I 1 , x2+2,!y+l
l*2 + y3 +l lx2y2 +z 4'12
2. Cho c6c s5 thgc kh6ng dm x,y,z thay d6i
th6a mdn di6u kiQn *2 + y' + 22 =2. T\m gi6
t4 nh6 nh6t cria bi6u thtcD_ D_ t- lt ) )) )) tl *' y" + y" 2" + z'x" +3 2(xy+yz+zx)+l x+y+z-1
Hi vgng ring qua c6c phOn tich hCn circ bqn
hqc sinh sE thu dugc nhi6u kinh nghiQm b6
ich vd hiru dpng khi d6i mit v6i c6c bdi to6n
trong dO thi tuyCn sinh vdo D4i hgc nhirng
n[m t6i. Mong c6c d6ng nghiQp phin htii, xin
trdn trgng cim crn.
t6
cAc DoaN THANG DONG QUT
@&@s(6ffiAS(6pf &@
$W
EArroArq coc 2 (THP'r)
Cltct tr;m gitic: ABC vo'i mdt didm O ndru bAn
trong /Gn1 giitr: dr5. Cuc tia AO, BO, CC ctit t:ac tanh BC, CA, AB theo th{r tqr t+ti N{, li, P.