Cfiu 2- Mdi Ong nghiQm chria mQt trong c6c dung dich sau: KI; BaCl2; NazCOs; NazSO+; NHqzSO+; KOFI; NaOH.. Khdng dirng thdm thu6c thl ndo c6 thA nhOn tlugc: D- 5 chdt.. Cho bitit trong q
Trang 1E{EIcFNG #AN GHAE pn snl rrsel FA{ F{oc LAN Hv
{27 tszizol rf
vA Dg: +oo Cf;u lt- Fiqp ch6t CrzHrr c6 c6u tpo g6m 6 nh6m {H: rlinh vdi 6 nguy€rr tr? C ciia nhAn benzen MQnh de
kh6ng dirle: ! I{gp chdt tr6n c6 tn6 trec dgng vrri Br6m khi cd bQt sit.
Cfiu 2- Mdi Ong nghiQm chria mQt trong c6c dung dich sau: KI; BaCl2; NazCOs; NazSO+; (NHq)zSO+;
KOFI; NaOH Khdng dirng thdm thu6c thl ndo c6 thA nhOn tlugc: D- 5 chdt
HD: LQp hdng ,vi KOH vd NaOH gi6ng nhau nAn chi nhdn &iqc 5 chdt
Cdu 3- Tir a t6n qudng manhetit chfta 80Yo FeaO+ c6 tnd eiAu chii tlugc 800 t6n gang chria 5o/o C Cho bitit trong qu6 trinh sdn xudt lugng sit bi hao hqt l% Vay a c6 giittri : C- 1325,16 t6n
.HD : Kkiii ltgn7 Fe c6 trong 800 ttin gang (800.95)/100 + 760 t Lryng siit thqc tii cin: 06A.100)/99 -+ 767,68 t Cri lmol FesOt + 3 mol Fe hay c* 232 tiin FetO+ +168 tdn Fe, vQy mutin cd 767,68 #n
Fe c,in 1060,13 tdn Fesot hay 1060,13.1A0/80: 1325,16#n
CAu 4- C6 cfrc ph6t bi6u sau:
1-Trong phdn fmg oxy h6a khri, NH3 chi d6ng vai trd ctr6t ttui.
Z- Vtu6i nitrat trong nudc c6 tinh Oxy h6a mpnh
l- TAt ch cdc mu6i nitrat dAu d6 tan trong nu6c
<t- Mudi nitrat trong mOi truong axit c6 tfnh oxy h6a mqnh
Phat bi0u dring ld: li- 1.,3, 4
C6u 5- Cho cdc cdng thrtc sau:
X- -[-].lH- (CH2)6-CO-I-"
Y- -[-NH- (CHz)s- CO-]-"
z- -bco- (cH2)4-co- NH- (CHz)o-NH-l-"
To'nilon img vdi cdng thrlc: A- Ce X,YrZ
CAu 6- Tinh linh dQng cria H hong nh6m -OH , ddp 6n dring ld:
I
OFI
CAu 7- Hda tan hodn todn m gam h6n hqp 3 6xit sft vdo dung dich HCI thu duo c dung dich X CO can Cung dich X thu duo c m1 gam h6n hqp 2 mu6i c6 tj lQ mol 1:1 NOu sgc khi clo du vdLo dung dich X, sau
c16 cd can thu ilu,o c ftn1+1,42\ gam mu5i khan m c6 gi6 tri : B- 6,08 gam
IlD Cir t mol FeClz + FeCls khiit lryng tdng th€m 35,5 gant, ,szry ra sii mol FeClz : sd mol FeCl: :
I ,42/35,5 - 0,A4 mol mp rTtFect2 * ntFects: I I,58 gam, trong dd mpa: 56.2.0,01 : 4,48 ganz yd tttL-1:
35,5.5.0,04 7, ! gam, m(t khdc ta thiiy c{r lmol 02- tuong drong vhi 2 mol Cl- .
Sr,it, rc sri mol d : 7,1/35,5.2 : 0,lmol Vqy sii gant citc 6xtt biing: m: mFe + mo: 4,48 : 0,1 16 :
6,08 gatn
CAu 8- MQt cdn c62 ffiacdn Ao B Tr€n cilZ ilacdn c6 2 c6c thriy tinh kh6i lugng nhu nhau chria cirng mQt lu-ong dung dich HCI n6ng d0 nhu nhau (cAn thlng bing) Th€m vdo c6c A mQt mi6ng Zn c6 khdi
luo.ng m gam, cdc B thdm 1 miting Mg cfing c6 khOi lugng m gam, de phan img hodn todn :
C- Eia A cd th6 chim xu6ng ho{c nim ngang vfi ilia B
CAu 9- D6 s6n xu6t phdn KCI nguoi tatich KCI kh6i NaCl trong qu{ng xinvinhit c6 cOng thirc:
KCl.NaCl dua vio su kh6c nhau gita: E- EQ tan trong nurfc theo nhi$t tI$
Cflu 10- Phucrng ph6p di6u ch6 etanol nio sau d0y chi dtng trong phdng thf nghiOrn:
C- Th&y phAn dAn sudt halozen trong mOi truang ki6m
cau 11- cho c6c ch6t: 1t; czHscl , (2) czHsoNoz, (3) cH3No2
(a) Tri nitro glyxerin (5) tri nitro toluene (6) (C2H5O)2O (7) (C2H5O)2SO2
Nhirng ch6t este ld: B- (1) {2) {4) {7).
HD: Este td sdn phiim thu dwqc khi cho axit fu6 co hay hftu co ) tdc dqtng vdi rwqu
CzHsOH + HCI * CzHsCl + HzO.
C2H5OH + HNO < -) C2H5ONO2 + H2O.
2C2H5OH t' HzSOq a + (CzHsOlfOz + ?H:O
Trang 2C:Hs(OFI): + 3HNOt A+ Cr-#;(ONO2)r + 3HzO'
CAU 12
Clo gif vai trd li chAt oxi ho6-hong cdc phin img: i)' I, ?,3,'{,5,6'
c6u 13- MQt loai rugu c6 kh6i luang ri€ng 0,92 g/ml thi d-0-rugu cria n6 li: *3- 4{}'()'
t{D: D0 nrqu ld ?(, theo Y' Ap dang cdng th*c dadng chdo, ta c6:
fItO (tl:I) -=\
A.g2 0,12 : 6
CzIlsOIl (d-0,5) \0,08 -+ q Vqv dp ruquIq 4q%-,
Ca" i;- H6n hgp X !O* 2 hydrocacbon m3ch ho c6 fj' nr6i troi so vdi hydro ld 11,25 ' Cho X di chQm
qua dung dich nudc iro* Au, sau khi pnan ,ring xiy raiodn todn kh6i lugng binh tdng th6m 0,84 gam' X
phdi c6 hydrocacbon: Ii- ProPen
]-{D: L{ : 11,25 2 : 22,5 Trong 2 hydrocacbon phdi c6 cHt - yhai InqnT cfia cHq : (l
'792 ' 22,5)/22,4- 0,84:b,giio",,railotcuo:a,g6/i6:0,a6vasiimolc*ahydrocacboncdnlqild0'02
mol ' + A,I: 0,84/0,02 : 42 : CsHa
NOs thu dugc 6,72
cf,u 15- MQt loai d6 chira cacor vd MsCOr dem hda tan bdng 190gl9Yig-f*h H
lit khi coz (dkrc) Sau ph6n ungphni a,lng ioo gam fung oichNaoH 8% de trung hda HNOr du' dung
dich rlem c6 cpn thu iul c 63 ga"m rnu5i tfr* COng thtciria lopi d6 d6 ld: c- cacor'2Mgco3'
HD: C6ng thftc lit aCaC:Os.bMgCOs
aCaCoj.btuigC73+Z(o+b)HNOs-' +aCaNO:)r+bMg(t'{_Ot12+(a+b)CO2+(a+b)Hd)
HNOs + NaOH +NaNgs + H2O nmto:: 2i*t: 0,6iot nur,iosa: ltNaNo3: 0,2mol sau khi c6 cqn
'*',iirA,r'iil;-simCaNo)r,-Msfibi,raiiwo,
Q6a-0,3a)/(a+b)+ (118'0,3b)/(a+b) + 85'0'2 63: a: 2b Suy ra a :] ; b : 2 va.c6ng tfu}c cila dd d6 ld CaCO j.2MgCo j
c6u t6- Eun nong *Oirra hqp ;o; t'i gam Ci{3cooH v! 4-,6 gam HCooH v6i.18,4 gam czHsoH c6
m{t cria HzSO+ dac, sau phan rmg thu duic h6n hqp este^v:1i 8,8 gam CH3COOC2Hs vd 5,55 gam
HCOOCzHs Hi-eu r;il;;tmtJ,i"g vdiz axit iHrCooU vd HCooH lAn lust ld: B- 50'rh-75'/'
HD: n5'sj1;ooH : 0,2mol ; nHCooH: 0,1 mol ; ncznsou: a'4 mol' Vi sii mol r$ou > sii mol axil nan
HC}}CzI{s : 5,55.100%/74-A,l: 75%' :.
;;;i?:;5t iiv troan ;63dn 6,72lit (dktc) mQt h5n hqp.ggm CzHzvitCzFI+ r6i cho todn bQ sin phdm
ch6y vdo dung dich nudc v6i trong du, sau phnn ung kh6i lugng binh nudc vOi tdng thOm 33,6 gam vd c6 m gam t<Ct ma rn c6 gi6 tri ld: D- 60 garn'
HIi : Gpi x vd y ld si| mo! CzHz vd CzHt ta cti: x + y : 0'3
x: 0,1 vt\1; : 0,1 tA i"i COt: 2x + 2y : 0,6 mol nAn:iyol CaCOs - 0'6 vit m: 60 gan'
C1u 18- Dung dich A chiia 0,01 mol pr6or), ua 0,15 mol HCI c6 khd ning hda tan t5i da m gam Cu (tpo ra khi NO duy nh6t) m bEng: B- 3,2 gam'
0,00s a, t
Xntol0,l50,03lI+(tuvdx:(3'x'0'03)/2:0'A$mol'
Vq' sii gam Cu phdn *ng : (0,045 + 0,005)64 : 3,2 gam'
Cffu 19- Nhiet phdn hodn todn 20 m6t h'6n fi;ilUgCO!, CaCOg vdBaCOg thu dugc chat khi e'
d;;idp il ij; dung dich nu6c v6i trong'ttliouq io ggo tet tria tring vd dung dich C, dun n6ng
dLrng dlch C lai thu duq? e;;kg, ttr Yotittoi toqttg cria MgCo: c6 gi6 tri ld : D- khoing
5?'5-86,'15610
HD: Goi cong th*c cfia 3 muiii ban ddu ld IutCO:' ]ulCO3
CO2 + Ca(OH)z + CaCOs + H2O
2CO2 + Ca(OH)2 '-+ Ca(HCO:):
Ca{HCOs)z '+ CaCOs + COz+'H2O
nCOt: A,1 + 0.06x2 : 0,22 moL
Trang 3Goi sti trtol AigCO:,CaC) j, BaCO: trong I\7gctnt h|n hpp tin taqt biing x, y, z ta c6:
81x+ 10fi,+ 1972:100 xty*z:,022x5:1,.1 -, y z- 1,1 -z v-it
100< (1ATv+ l97z),/11t+z)= 01A-B4x)i(l,t-x) < 197 Suvra 52,5!%<B4x<86,75%.
CSu 20- Cho 0,25 mol CuO tan hiit trong dung dich HzSOc 10% vta dir vd dun n6ng, sau phAn img ldrn
lanh dung dich d6n 10oC Lugng tinh thd CuSỢSHzO t6ch ra kh6i dung dich ld m gam, bi6t dO tan cria CuSƠ d 10"C bingI7,4 gam, m nh0n giri tri: A-38,5 gam
" fID : nCu) : nCuS)+: A,25 mol : nt CtrSOt - 0,25t160 : 40 gam
nH2SOa - n{)uO : 0,25 : trttdi lwqn7 dung dich Hzfiot 20% cdn ; 0,25x98xlAA/20 : 122,5 ganl
t{hi|i bqng dung dich CuSƠ ld: 122,5 + 0,25x84'- 142,5 gam DQ tan cfia CuSO,t 6' l0"C ld 17.4 gam
t{rc ld cir 100 gim I{2O hđ ten duqc 17,4 gum CuSOa tqo t'a rhmg rlich bdo hdạ Gpi a lc\ tii go*
Ct$O,t.5HzO tirch ra thi s:ii gam CuSO,t tdch ra Id l60a/250 vd sii garn HzO trir:h theo ld 90c/ 250 ta cd
(40- /60a/25Q : (142,5-40-90ai250) 17,4: 100 snyra (I:38,5 gam.
CAu 21- 56 6xy h6a cria S trong phdn tu (NH+)zSzOs ld: Ạ +6
Cim22- D€ ph6n biQt phenol va iuqu benzylic ta phai dDng thu6c thti C- Cin 2 vi 3 trong s6:
i - Nạ 2- dung dich NaOH 3- dung dich nu6c brom 4- dung dich nu6c v6i trong
Cfiu 23- O6t chay hodn todn 2 hydrocacbon c6 cilng s6 mol vd cirng s6 nguy€n tri C trong phdn tft thu
cluo-c 1,76 garn COz vd 0,9 gam I{zỌ Hai hydrocacbon d6 ld: A- Cztlo vi Cz}I+
HD: tr/i nHzO > n(loz n€n chi c6 I trudng h.op xay ra: ho(c I ankanvd I anken
Ndu ctt 2 an kan thi chi ld I chdt, ndu I ankan vd l ctn kin thi kht diit sd cd cimg sii mol HzO vit COz.
Gpi ntd sii rcgtryLn t* C vd sii mol ld ạ Ta c6:
Cnlf:,1t + Ot -+ nCOz + futI)tI2O
CnÍIz, + Ot + nCOz ",' nH20
an + an : 0,04 -+ an : 0,02
e(n+I) + an:0,A5 -+arl*ct * an: 0,AS +a:0,0lvdn:2
Cfra24^ Cho hai mu6i X, Y tho6 mdn eli€u kiQn sau:
X + Y ) khOng xiry ru phin img
X + Cu
-> kh6ng x&y ra phin ung.
Y + Cu -+ khOng xiy ra phdn img
X + Y * Cu + xiy ra phin img
X vd Y ld mu6i : Ạ NaNOr vh NaI{SỢ
Cfru 25- Cho c6c ch6t: CaHleO, CaHeCl, C+Hro, CaHlrN SO d6ng phAn cria c6c chAt giSm theo thrl qu:
C" CqFtrrrN" CaFIr*Oo C+HcClo C+Hrọ
CAu 26- Cdc cdukhdng d!nh:
ll Chhthiru co ndo c6 khd ndng cQng du-ọ c hitlro sE cQng iluọ c dung dich brom
S I sai,ll dr&ng.
Cdru27- Phdt bi€u elring:
C R.wqru thorn IA chAt cd nh6m hidroxyl gf,n tr6n m4ch nhdnh cria hidrocacbon thóan"
Cflu 28- Dung dich X ld h6n hgrp cria rugu etylic voi HzỌ Cho 20,2 gam X t6c dr;ng v6i Na dr.r thu du-ọ c
5,6 lit H2 (dktc) nitit ttrOi lugng ri€ng cria rugu la 0,8 g/ml vd cria H2O la I g/ml EQ cua rugu X ld:
A- 92.74"
.HD: Goi x vd y td sii rnol CzHsOH vd H2O nong hdn hqp X, ta c6:
x-rl:0'5
16x + l9y : 20,2 gidi ra ta dụoc x: 0,4 vd x : 0,1
Y,$y dO ruqu ld 23.1\aiQ3't I ,8) : 92,74".
Cffu 29- Khi d6t ch6y hodn todn mQt lugng polyme X ( t4o thanh do qu6 trinh d6ng trDng hgp dimeryl buta-1,3 dien vd acrylonitrin) vdi luqng 6xy vila dri t4o thdnh mQt h6n hqp khi o diAu kign nhiQt d0 vd
6p suAt x6c tllnh ch&a 57,69Yo COz v0 th6 tich cdn lpi ld hoi nu6c vd kh( Nz Ty lQ mol cta 2 monorne tusng img trong X ld: A- l:3
IID: Sanphdm ld [x(CII2- C: C- CHr).yrCfIz-CH-J,
li
I
CN
Trang 4khi n : 1 ta c6:C6ng thtkc nguyAn xCoLIto'yCstl3ll' phitn *ng chay:
xCaf{to.tCs-I13M + Oi -*(6x+3y)CO2+ $x-3i2fl112.Q + 1/2N2
ria ii
"n' i,r'i hi't na6c vd N zt d I 0 0- 5 i, 69 - 42' 3 t' l['a cd :
(6x+3il/(5x+3i21'+v/2) -.57,69/ 42,31 -+ x : y : 1: j
Cffu 30- D6t n6ng *d;'6^;; sd; ;0 gam bQt Fe r;a 3-0 g-?T b6t luu huimh trong tlidu kien khdng co kh6ng khi dc pnan mg .av J i*." toan ihu du,o c ch6t ran X Hoa tan chf,t ran X bing dung dich HCI du thu dugc dung dich y-va [ni z, d6tcnay noan toan z
"an toi ttri6u v lit khong khf o dktc (chira ii5 oz
vC ttr6 tich) Gi5 tricria V ld: C- 165 lit'
I{D: nFe > nfi n€n ,sau phdn *ng chay s hdt, ltet,qud cuiii ci.tng ld Fe vd s nhadng e cdn oxy nhSn
e: Fe - 2e : F'e*2 Sii mol e md Fe nhtdng 60'2/56' ! .
S - 4e : To Sis mol e mir s nhudng SO.iiSZ gpix k\ t2yolOz thi s6 mol e md Oznhdnlir 4x'
6A,2/56 + 30.4/32 : 4x '-+ x = 1,473' mol viti'tol'- t''1f 52'22'4'5 : 165 lit
CAu 31- MQt lopi nu6c cimg c6 chira 0,0;'^;;*; ; 6,oo n,otJvJ; 0,03 mol Mg'*; 0,01 mol NH+.;
0,02 mol SO+2-; 0,1 I mol HbOl- va * *ol Cft- C- O,tiZ mol vh nu6c cr?ng t4* th&i' ( x nhfln gi5 tri
0,02 mol vd nudc ld nudc cimg t4m thoi')
"'"
ii,i'i tl mot HCo3- > 2-sd mal M! " vd oa'n
Ciu 32- MQt h6n hqp gdmNzi Hz vi NH ;; * ryi hgr
;o^vdi hydro Uang 8t cho
h6n hqp ndv di qua
dung dich Hzso+ oaJtf;ilrre ti"r,
"on tai mot,-r* rr,ann pnan % theo v cfia c6c khftucrng img trong nu"Iff
'fr; nu, : #;1Y';?.;/;'ni!,';,so,t ditc chi c6 NH: rdc dqng coi m9i tu.sng-phdn.,.*"'*ns binh crta H2 rtd N2 lil lvt, ta c6 At{ + I7)i2: 8 -+ M :!5''Suy ra % crta Hz : % c*a Nt vi AI bdng trung b]yh 11ns x L^* L^: r-:* r^oi
',a im 30% vc klroi luo-ng) vdo 50ml dung
Ceu 3i-lir gam h6n hqp hai kim loai Fe, Cu (tronq d6 Fe chi(
ffi *,;;;;;;;t;tt (d: 1,38 ;""fit,il'"0"g,-r.ryiv dou hdn hqp t6i e6c phan img hodn todn
thu duoc rdn A
"an'nang ti,z5 m
J.*g oi.rt e thi thu auqi g- 35,1gam mu6i khan'
I'ID : Khiit luqng Fe : 0,3m (g); khdi t"q'i-'i' l: 0'75 m(g) SuTt ra luong Fe phdnil'ng: 0'25 m
> Fe du : cu chra phdn wng Dwng dich B chtita FeNOs) z, bh6ng ct5 FeNOs) j vd ctt(Nos) z
lthdnhwkhi = 6,72/22,4: 0,3 mol
sd mot HNot: t9 ]':9^u' =s,6e (rnot)
100.63
Fe ) ps2* + 2e
NO3' + 3e - -)NO
NOj'+e -+ NOz
56 mal Noi tao rtuiii : 0,69 - 0,3 : 0,i9 (mol) Kltdi tirqng FeNos)t:
|'0,:lts 6+62'2)= 35'1(g)
iru.il;il;Jffii:r il, sd oxi ho6 cria cdc nguy.n t0 c6 th thay d6i lrgqc r<ngns thav d.i.
2) Trong phan ung rG 6'"*i rt"a cua # ngi'yen't6
": rlC thay d6i ho4ckh6ng.thay tl6i'
+; fron! bttan ting iro6 hqp, s9 oxi ho6 cria c6c nguy€n t9 khonu tnav cor'
5) rrong phan ung trao d6i, sr5 oxi h"i;;;;i" "i"t9" :g:-: ttti"j oqi hopc khong thav d6i'
6) Trong phan ung il ;6i so oxi ho6 cria c6c nguy€n
1o 51rons thay t10i'
7) Trong phen ung ;hq ;5;;t h;a 'it-t* nguvci to luon thav tt6i'
'
t'lttung ciu thing lh : I].- 1,3,6 r1'
Cfru 35- Nfr6g"rt6t ra"Aong phln c6u tao crla nhau: C- 1 vi 4; 3 vir 7'
trucmg axit sunfuric theo Phin img :
MnOz +H2C2Oa + H2SOa -+ MnSO++COzt+HzO
Yotqp chdt c6 trong MnO2: B- 13%'
HD: nHzCzO4:0,8851gA:rttr4nOz -t m Ir'InOt: 0'885'87i90 : 0'855 gom
%tqp ch(it: IaT% - 0,855'Ia0%/0'95: I3%
Trang 5CAU 37- Hydrat h6a 1,56 gam mdt ankin A thr-r duoc andehit B Trdn B v6i andehit don chric C ThOm i-12O thdnh 100 ml dung dich D chrla B vd C vdi ndng dQ tdng c6ng lA 0,8M Thdm tir tir dung dich AgNO3 du trong NH: thu duoc 21,6 gam Ag ktlt tria Cdng thric ciia B; C vd s6 mol cria B rrd C c6 trong dung dich ld: A CFITCfIO; ff CF{O 0,(}{r nrol B vri 0,02 mol {1.
IID : B td CH3CHO v6i sii mol bing,sii mol cfia CzH:: 1,56i25: 0.06 mot
Sii mol Ag: 0,2 mol ,vuy ra s6 mot A/ do C&CH} tno ra ld 0,12 mol vtt,s6 mol Ag tlo andehit (t tqo ra
Id 0,08 mol Vi c* A,02 mol andehit taq ra 0,08 mol bqc nln theo cdc ddp dn B chi cd thd td 1"1(-.HO.
CAU 38-, Cho m gam mitn cua c6 chtra 60:%;o xelulozry thriy phdn thinh glucozo, sau i16 l6n men thdnh
rucvu D6 thu dugc 1,40 lit rucru 90o thi m bing: Ili 5135,87gam ( hiQu suAt cria tirng ph6n img chi ttat 8o%.)
HD: 77ong ruo.u 90n thi c* I lit rao.u co 0,9 lit Czlldll-i v$t trong 1,40 lit raou cd 1,4.0,9:1,26 lit
{:2tJsOH t,d sd mol ruo.u ld 1260.0,8/46:2t,gl ntol theo hi€u suiit vd 04 xenlulozo trong mim r:aa ta ttnh du.oc sii gam miln ctm phdi dtury:
Cd{toOs } C6H12O6 -} 2CfisOH
(r 260.0,8/46).(t 00/80) (1 a0/80).(1 00i60) I 80 : 5 t 35,87 gant
CAu 39- Thriy ph6n mQt este no dcyn chr?c bing dung dich NaOH vla drl thu dury c mu6i khan cO kh6i lugng phdn trl bing24/29 k*r6i luqng este Tj't<trOi froi cira este so v6i kh0ng khi bing 4 C0ng thrlc c6u
IfD; Mn,rc: 29.4: 116 M^,ai : 24 II6i29:96 c6ngth*ccrtamuiStld
I|-COONa : 96 suy ra R: 29 vd c6ng tfubc crta este ld (lzHsCOOCsHz
CAu 40- Chon mQt ddng phdn cta este c6 c6ng thric CqHoO2 thoi mdn diAu kiQn sau:'
1 CQng hqp tlu-o c vdi hydro theo fj' lQ I : 1.
2 Phan img chflm vdi NaOH o nhiQt dQ thucrng nhtmg phdn img sE x6y ra nhanh khi clun n6ng
3 S&n phAm thu tlugc khi cho tac dgng v6i NaOH c6 thO tham gia phin img tn{ng gucrrig.
A- CH3-COO-CH:CF{2 Cfiu 41- Cho tlng dung dich ri6ng rd sau : CHrONa, NHNOg; NaHCOT ; NaCl ; CHTCOOK ; NaHSO+
; CuSOa ; KI ; AgNOr ; CHTCOONH4 SO dung dich c6 mOi trucyng axit ld: E- 4.
Ciu 42- Hqp chet X c6 c6ng thr?c phdn tti CrHsCl: Thriy phAn hodn toin X thu dugc ch6t Y Y t6c dung
ttuo c vdi Na gini ph6ng I{z vd c6 phin img h6ng guong X c6 c6ng thrlc c6u t4o ld:
.D- C,H2C[-C Frz-CHC tz.
CAu 43- Hda tan 4 gam oxit Fe*O, cAn vira di 52,14 ml dung dieh HCI 10% (d:1,05dm1).COng thirc
cria Fe*O, li: B- Fe2O3.
IID: Fe,O, + 2yH(:l + xFeCI2yn -r yH2O
4/(56x + 161;): 0,15i2y + x/y:21j , x=2 vd ti:3
Cdu 44- H5n hqp X gdm rugu no A vd axit no don chr?c B dAu mpch hcy Chia 30,6 gam X thdnh 2 phdn
dugc 22gam CO2 vd ||/gam H2O COng thrlc cria axit vd rugu lA :C- CI-I:COOIII vh
O[{-CI'r[z-C]-Iz-OFT.
,HD; Goi cong thirc phdn t* cfia rtgu vd axil tdn IwOt ld CnH2n+2-2x(OH)x vd Cmii2mO2 vit ,yii neol
ldn ltrqt ld a vd b T* cdc dtr ki€n ta cd cdc pltaong trinlt:
cx+11:6,4
na*mh:0,5
na * s7 + mb : O,fi.GiaihQphwongtrinhtaduqc:2n-t3m: 10 Chicdcdp a:2 vdb:2
ld phil hqp Tit dd xdc dinh daqc x:2 vd nghiQmphit hgp ld C.
Cdu 45- MQt h6n hSp A gAm CzHe; CzH+ vd CrH+ Cho 6,12 gam h6n hq,p A t6c dgng vdi AgNOs,AtrHr
du dugc_7,35 gam t6t tua Mpt kh6c 2,128litA (dktc)phnn ftng vira thi vOi lO ml dung dich nudc brom 1M Kh6i luqng C2FIa trong h6n hqp A ld: C- 1,12 garn
ItD: Gpi sii mol ctia CzHa, CzHq vd C:Ht tin htqt lit a,b.c Chi cd CsHa tcic dung vdi AgNO/NH:
+ c : 7,35/147 : 0,05 mot Sii mol Brdm phdn *ng vdi cd hdn hgp 0,07(a+b+c)/0,095 Ta cd h€ pt:
(l).30a + 2Bh + 40c + 6,12
(2) c : 0,05
Gidi hQ pt ta daqc a: 0,1 vd b: 0,04 vd m CzHt : A,01.28 : I,l2gam.
Trang 6c$u 46- o6t cnay hodn todn m gam mQt amin A bing mOt luong khOng khi vria dir (gin thi€t hong kh6ng khi co tn inetich ld o"y
"dn lai id nito) thu duoc 17,6
gam CAz , 12,6 gam H2O vd 69,44 lit Nz
(dkrc) ' F/i c6 gi6 tri ld: !!-.9 garu
ittl, :'hth sd gam C + sii gam H + sii gam N
,\ii gam C ti C& - 1,8 gam
Sd gam N :2,8 g(mt 7'6ng sd : 4,8 * 1,4 + 2'B : 9 gam'
Cfru 41-Nung 28,8 gam mu6i natri iria mQt axit fcrn chric vcvi NaOH (CaO xfc t6c) chi thu duo.c 21,2
gam xoda va m6t hidiocacbon duy nh6t E6ld mu6i cria axit: _D- Cr,fIs-COONa
-HD:
R-COONa + NaOH + R-It + Na2COs Theo dinLt ludt btH:
LtNa2Co3- 21,2/1A6: 0,2 tnolvc'r 28,8 + 0,2'40 : 21.2 + m ) m:15,6
lu! : 15,6/0,02 : 78 cong tlirc c*a n6 ld CaHs-COONct
Cflu 4g- Cho 18,56 g;m mQt oxit rltia" dung hodn todn vdi dung dich FINO3 thu dugc dung dich X vd
0,224litkhi (dktc) ld mQt oxit cira nito ld san"ptrAm duy nh6t Cdng thric cfia 2 oxit lAn lugt ld :
A-FetO+ vi Nz0
ftD : Edt cong thirc ctia 2 oxit ld Fezon vd Nzom{v6i ns3 va m!5)
2.18,56/(l 12+ l6n) : 2.18,s6'(3-n)/(l l2t" t6n)
Suy ra,yd mol', niqn 0,02(5-rn vd la cri sii mol e cho biing sii mol e nhQn
2.15,56.(3-n)/(t t2,tin) : O,OZ1S-*1 Pt rAn c:hi cd cdp nghiQm hW t! m:l vd y 8/3'-Edp dn A'
C6u 49- DiQn phdn 400 ml iung dich chria ddng thdi KCI vd HCI voi diQn clrc tro,
Tdng leP "P l?:
ihli gian aicn pnan ld20 phrit v6i cudng dQ ddng diQn 9,65.ampe thi dung dich thu-<tuq: :ry:,*Q':lat
tan ci pg : tg.coi trr6 tictr dung dich thly'doi t tto"g dSng k6, nAng dQ moVl cria HCI vd KCI ban ddtt liin lugt ld: A- &.2M vti 0,1M
nni fheo ddu biti, tinh itugc s6 mol Hz ld 0,06 mol, vdi pH:13 tcr c6 [OHJ: 0,]M
Sii mol KOH c6 trong l1Antt clung dich sau diQn phdn ld 0,04 nnl
Khi diQn ph6n ctung"ai"n.nay thi ilit diQn phdniru6c, yu dy mbi ddn KCt
2HCt- -+H2 + 7:12 sii mol HCt ban ddu ld 0,08 molvd Ctrua: 0,08/0,4:0,2ju{
2K{'t + 2H2{) +2KOH + H2+CI Sii mol KOH : 0,04 thi s6 mol KCI ld 0,0'l vd Cp16g1: 0.04/(i.'! =
0,1M
Ciu 50- Cho phan img thu{n nghich:
2SO2 + oz <+ 2SOs (c6 xric tiic VzOs vir to) VQn t6c phAn img thuQn thay ddi nhu thiS ndo n6u ldrn ginm th€ tich cria hQ d6 di 3 16"r: C- Ting 27 lin'
itTt',-Cr7rA"g;A-i;";d" crta Soz vd oz lit u vit i Trc6c khi giitm thd fich :
Yt : Kt fsot]' totl : Kt.t/ -b
Khi giam tha tich itAnininiis dA cfta ca hQ tdng 3 lan nin t6c d0 lic nrty Vs ld:
[,'s : Kr.[3a]2 '3b : 27Vt t*c lit idng 27 l6n'