ĐỀ THI CHỌN ĐỘI TUYỂN DỰ THI QUỐC GIA VÀ GIẢI TOÁN TRÊN MÁY TÍNH CẦM TAY MÔN HÓA HỌC VÒNG 2

ri rsr cHQN ogr rwnN HSG ur/ rru crar roAN

uBND TiNH rnAr NcuYf,N
so crAo DUC vA oAo r4o

op cniNn

EIEM CUA TOAN

rnfiNMrcr@gc2o1s

-2016
THPT
L6P tz, cdP

Mon: n6a ngc.
Thdi gian: 120 phri-t (khOW kA thdi gion giao
Chri f : - Pe thi gdm 96 06 trang'
- Thf srni ldm bdi trtrc tidp vin di thi ndy'

rnrlc

cAC CrAU KIIAO

NAT TTTT

(Ho, tAn vd chit ki)

s6

dA)

mAcn

(Do Ch* tich HD chiim thi ghi)

Bdng chtr

Bdng s6

qua ttnn
0t

wuo Ket quu
tuuru' Loc
ost toan.
Ke bai
tten kA
A trong hdn
vao 6
toan vdo
qud t[nh
tinh todn
^EL
ary dtrt, ?r/ sinh tri.nh Qdy cdch gidi, kit oud
quy tac tim trdn sd cila don vi tinh quv dlnh
chinh xdc t6i 4 chir"ti"i:naTrnrp pir;; ;;"iA, pnay theo

- todn
"trong
-.'o bdi

(

cho: H=1;' C =12; N:14; O=16; Nu=23; K=3g; ca=40; Ba=l37; Fe=56;
Ai=27; Zn=65; Cu=64; A{-108; Ni-59

)'

Cffu 1: (5,0 tli6m)
OO"g

vi flc"

phen rd ph6ng x4 d6ng thdi theo 2 phhntm5

if,c,

kt

,

\[2,+s*cu

vitffc,S!f;Ni+r
.p

.

trorn-^::l-t1#u
25 gid 36 phft t6y

ban aAg
Thlrc nghiQm
*cu
1on
"noii6ttu
mQ] luqng d6ng vi
g
Tt
tan.
ot
tt
tatt
gam
ch6t
16
cdn
du
thi
HCI
dich
dung
tan vdo
dich KoH du thi phen
ban ddu, sar2gsib
il;iAy-hbt hsrp cdn rai 00 hoe vio dungrinh
chu ki b6n rd ctra
so,4vo rhoi ruqng hdn hqrp.
rl[ai r"srs
6acu
ve st5 mol ctra Zn, Ni

1

;;br?;kff; ;;;

;;

mJ

bil;

til


cAu 2z (5'0 tli6m)
1 thltc t6 mQt phdn ion s]- dugc thay
c6ns thric Fesz, trong
Th"o li thuytit khoang pydt c6 c6ng
th6 b6i St va c6ng tfr"" iO"g quSt cira pyrit ld FeS2-*. Nhu vfly, c6 thri coi pyrit nhu li h5n
hgrp FeS2, FeS. Khi xir ly *Ot -5, k*r*i"g vdi Br2 trong KOH du thi xby raphan img theo
scv

d6:

-

Fe(OH)3 + KBr + K2SO4 + H2O
FeSz * Brz + KOH
Fe(OH)3 + I(Br + K2SO4 + H2O
FeS + Br2 + KOH
Sau khi lgc, dugc chdt rinA vd dung dich B

thu dugc 0,2 gam,Fe2O3.
- Nrmg cnatrhnA d6n khi5i luqng kh6ng dOi
Cho dung dich BaClz du vdo dung dicfr g thu dugc 1,1087 gam kiit tua BaSO+.

. -1. X6c dinh c6ng thric t6ng qu6t cria ktro6ng pyrit.
2. Tinh I

Br

A6

oxi h5a m6u
Cdclt gidi

tr6n.

K1t qad


:
Cfiu 3: (5,0 di6m)
r
)^
- - r- SOI-.
*?1,'lM
phel?Tg
2
X.ldm
Chia
COr'',

1. Cho dung di+ X chira: K*, NH+* ,
va
tdch ,1.6:41-e?y fit
i1a c6
cho t6c duns hct v6i dung aich ea(Orqf du, dyn.n6ng thdy
Or"fho?l toan v6i dung dich HNO3 thi thay
tho6t ra 672-mlkhi (dkrc)IpnA" Z ct o
trong dung dich X'
336 ml khi (dktc) bay ra. Tinh t6ng kh6i lugng mu6i tan
lugng nhiet dQng rg.u:
2. Cho citc

'

!*

AH" (kJ.mol-t)
.ASo

Tinh AG" cua

(J.mof'.K-')

H3PO4(dd)

HzPO+-(dd)

rf+olr+H2o

-1288

-1296

-s6

158

90

od n6c thir

o,

81

oH'.
r0t


Cflu 4: ( 5,0 iliAm )
Dung dich A gdm axrtHzCzOa 0,1M vd axit
1.*#er;; hUr,oun toan to ml dung dich

c6 pK,r

:

1,25 vlr PKr2

:

A cdn25 ml dung dich NaoH 0,12M. Tinh


c6u5:(5,OiliAry) ,
.
, \ ,1___^L^.,:*L
mol
(ti
chia 44,8 gamtrorl rrqp X-g6m axit axetic, glixerol vd etyl axetatldm ba phan lQ s6
trong m6i ptran ld nhu nhau).
- ph6n !: tdc AU"g htit v6i Na thu dugc t,3441ft (dktc) khi H2.

oiua cilc ch6t

.Phan2:t6cao"evtadirv6i500mldungdichNaoH0,4Mklridunn6ng.
-;ha"l' irO'f.fr}i lugng bang kh6i luqng phan 2) thc dung v6i NaHCO: du thi
2,6881it (dktc) khi baY ra.
Tinh khOi luqng m5i ch6t c6

suAt c5c

d6u ld lO0%

c6


C6u 6: ( 5,0 (ihm )
b gam
Ch" , gu- frO" hq,p g6m 2 esteA vi B tdc dUng htit vOi dung dich KOH thu dugc

i axtthiru co itcrn chric tancol D vi 2,688"';;-;b; hae -"ai t uti
""u voi tdi xrit drin phan img hodn todn th6v
i"a" uO -"aitre"
dugc san
tho6t ra-0,67iLrt hfn frqp-khi E (odkrc). otit ch6y hoan todn lugng ancol D, thu

loiJiur';d;jlfi;ilG
phAm chdy

c6

thdy 1.chru
t ctla ub.

m"o,

*i

:1,63 vd khi bi h6p thlr hoin toan bdng 45 ml dung dich Ba(OII)2 0,5M

z,{s| gam k6t til*. Xdctlinh c6ng thric c6u t4o c6 thiS co cta A, B vd tinh giit

(Hpc sinh kh1ng itwqc sfr dqng tdi tiQa, gidm th! coi thi khflng gi&i thich gi thAm)