uBND TiNH rnAr NcuYf,Nso crAo DUC vA oAo r4o op cniNn rnrlc 6acu ve st5 mol ctra Zn, Ni ri rsr cHQN ogr rwnN HSG ur/ rru crar roAN Mon: n6a ngc.. rinh chu ki b6n rd ctra s6 mAcn Do Ch*
Trang 1uBND TiNH rnAr NcuYf,N
so crAo DUC vA oAo r4o
op cniNn rnrlc
6acu
ve st5 mol ctra Zn, Ni
ri rsr cHQN ogr rwnN HSG ur/ rru crar roAN
Mon: n6a ngc L6P tz, cdP THPT Thdi gian: 120 phri-t (khOW kA thdi gion giao dA)
Chri f : - Pe thi gdm 96 06 trang'
- Thf srni ldm bdi trtrc tidp vin di thi ndy'
ary dtrt, ?r/ sinh tri.nh Qdy cdch gidi, kit qud tinh toan vao A trong tten Ke ost tuuru' wuo
^EL quu 0t
chinh xdc t6i 4 chir"ti"i:naTrnrp pir;; ;;"iA, pnay theo quy tac tim trdn sd cila don vi tinh quv dlnh trong bdi todn
" -.'o -
( 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- vitffc,S!f;Ni+r .
Thlrc nghiQm
"noii6ttu 1 mJ *cu ban aAg .p 25 gid 36 phft t6y
1on trorn-^::l-t1#u tan vdo dung dich HCI du thi cdn 16 gam ch6t tatt tt ot g tan Tt mQ] luqng d6ng vi *cu
ban ddu, sar2gsib ;; il;iAy-hbt hsrp cdn rai 00 hoe til vio dung dich KoH du thi phen
;;br?;kff; ;;; rl[ai r"srs bil; so,4vo rhoi ruqng hdn hqrp rinh chu ki b6n rd ctra
s6 mAcn (Do Ch* tich HD chiim thi ghi)
EIEM CUA TOAN NAT TTTT
cAC CrAU KIIAO
(Ho, tAn vd chit ki)
Bdng s6 Bdng chtr
kit oud t[nh todn vdo 6 hdn kA bai toan Loc Ket qua ttnn
Trang 2cAu 2z (5'0 tli6m)
c6ns thric Fesz, 1 phdn ion s]- dugc thay Th"o li thuytit khoang pydt c6 c6ng thric Fesz, trong thltc t6 mQt
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:
FeSz * Brz + KOH - Fe(OH)3 + KBr + K2SO4 + H2O FeS + Br2 + KOH - Fe(OH)3 + I(Br + K2SO4 + H2O Sau khi lgc, dugc chdt rinA vd dung dich B
- Nrmg cnatrhnA d6n khi5i luqng kh6ng dOi thu dugc 0,2 gam,Fe2O3.
- Cho dung dich BaClz du vdo dung dicfr g thu dugc 1,1087 gam kiit tua BaSỢ
1 X6c dinh c6ng thric t6ng qu6t cria ktro6ng pyrit
A6 oxi h5a m6u
)
Trang 3Cfiu 3: (5,0 di6m) r - - r- - ^ )- :
1 Cho dung di+ X chira: K*, NH+* , COr'', SOI- Chia X.ldm 2 phel?Tg *?1,'lM
'
cho t6c duns hct v6i dung aich ea(Orqf du, dyn.n6ng thdy tdch ,1.6:41-e?y fit i1a va tho6t ra 672-mlkhi (dkrc)IpnA" Z ct o !* Or"fho?l toan v6i dung dich HNO3 thi thay c6
336 ml khi (dktc) bay ra Tinh t6ng kh6i lugng mu6i tan trong dung dich X'
2 Cho citc lugng nhiet dQng rg.u:
H3PO4(dd)
Tinh AG" cua
r0t
Trang 4Cflu 4: ( 5,0 iliAm )
Dung dich A gdm axrtHzCzOa 0,1M vd axit
1.*#er;; hUr,oun toan to ml dung dich A cdn25 ml dung dich NaoH 0,12M Tinh
c6 pK,r : 1,25 vlr PKr2 :
Trang 5c6u5:(5,OiliAry) , , \ ,1 _^L^.,:*L
chia 44,8 gamtrorl rrqp X-g6m axit axetic, glixerol vd etyl axetatldm ba phan (ti lQ s6 mol
oiua cilc ch6t trong m6i ptran ld nhu nhau)
- ph6n !: tdc AU"g htit v6i Na thu dugc t,3441ft (dktc) khi H2.
.Phan2:t6cao"evtadirv6i500mldungdichNaoH0,4Mklridunn6ng.
-;ha"l' irO'f.fr}i lugng bang kh6i luqng phan 2) thc dung v6i NaHCO: du thi c6 2,6881it (dktc) khi baY ra
Trang 6C6u 6: ( 5,0 (ihm )
Ch" , gu- frO" hq,p g6m 2 esteA vi B tdc dUng htit vOi dung dich KOH thu dugc b gam ancol D vi 2,688"';;-;b; hae -"ai t uti
""u i axtthiru co itcrn chric t<c tiiip nhau trgqg
loiJiur';d;jlfi;ilG i"a" uO -"aitre" *i voi tdi xrit drin phan img hodn todn th6v
tho6t ra-0,67iLrt hfn frqp-khi E (odkrc) otit ch6y hoan todn lugng ancol D, thu dugc san phAm chdy c6 m"o, :1,63 vd khi bi h6p thlr hoin toan bdng 45 ml dung dich Ba(OII)2 0,5M
thdy 1.ch ru z,{s| gam k6t til* Xdctlinh c6ng thric c6u t4o c6 thiS co cta A, B vd tinh giit
t ctla ub.
(Hpc sinh kh1ng itwqc sfr dqng tdi tiQa, gidm th! coi thi khflng gi&i thich gi thAm)