tuyển chọn bài thi trắc nghiệm theo cấu trúc đề thi môn hóa học

T6ng he s6' cac so nguyen, t6'i gian ciia tat ca cac chat trong phuomg trinh phan ling giua Cu vdri dung djch HNO, dac, nong la A.. Phan ling nghich thu nhiet, can bang dich chuyfi'n t

T CXI C

NGUYfiN VAN T H O A I - PHAM DINH T H A N H

T R A N TUAN V I $ T

TUYENCHON BAI THI TRAC NGHIEM THEO CAU TRUC DE THI

MON HOA HOC

(Dung de on luyen thi tot nghiep THPT va Dai hoc, Cao dang;

THi; VIENTIWHBINH THUAN

NHA X U A T BAN DAI H O C SlT P H A M

Ldl NOI DAU

Cuon sach "Tuyen chon b^i thi trac nghiem theo cau true cJe thi

-Mon Hoa hoc" danh cho hoc sinh dang on luyen thi tot nghiep Tl ;PT \/a

thi vao cac trUdng Dai hoc va Cao d i n g

Trong vai nam gan day, Bo Giao due va Dao tao da cong bo c u true

m6i cua de thi tot nghiep THPT va de thi tuyen sinh Dai hoc, Cac liing

De giup hoc sinh c6 tai lieu on luyen phu hdp va thiet thiic, chung -oi bien

soan cuon sach nay v6i npi dung: TuySn chon sSp xep cac bai thi trSc

nghiem theo trinh tifcau true de thi, dong thdi rat chu </ den npi dung va xu

hirdng mdi ra de thi trac nghiem cua Bp Giao due va Dao tao (de thi giam npi dung hpe thupc, tSng npi dung van dung suy luan va nhieu cau la nhOrng bai toan hoa hpe can thiet)

Npi dung cuon sach gom hai phan :

Phan I - Tuyen chon cac bai thi tr§c nghiem theo cau true de thi

Cac bai trac nghiem dU'dc tuyen chpn la cac bai c6 trong eac de thi tuyen sinh Dai hpe, Cao d i n g nhOfng nSm qua va c6 trong cac de thi hpe sinh gioi toan quoe

Phan II - Hudng dan chon dap an

Trong phan nay chung toi gidi thieu va ap dung nhCrng phiiang phap

giai nhanh cac bai toan Hoa hpe, nhu":

- Phi/dng phap bao toan nguyen to;

- Phi/dng phap bao toan dien ti'eh;

- PhL/dng phap bao toan khoi liidng;

- Phu-dng phap tang - giam khoi liTdng;

- PhU'dng phap trung binh;

- PhU'dng phap bao toan electron;

- PhU'dng phap tfnh theo phiTdng trinh ion;

- PhLfdng phap xac dinh va can bang lien ket n trong phan tCf hdp chal

Xin tran trpng cam dn!

CAC TAC GIA

+ Phdn chung cho ta't ca thf sinh, ra theo n 6 i d u n g gi6'ng nhau giira

chirong t r i n h Chudn va chuang t r i n h Nang cao

+ Phdn rieng ra theo tung chuang trinh: Chuang trinh Chu^n va chuang

trinh Nang cao Thf sinh dugc chgn m6t phSn rieng thfch hgp de lam bai; nfi'u lam ca hai phSn rieng t h i ca hai ph^n rieng d6u kh6ng dugc cha'm

- Dd'i vdfi cac m 6 n Ngoai ngu: thi m 6 i m 6 n chi c6 phSn chung danh cho ta't ca thf sinh, ra theo n6i dung gi6'ng nhau giira chuang trinh Chudn va chuang trinh Nang cao, khdng c6 phdn rieng

2 Y e u c a u va mure do kien thure

a) Yeu cau on tdp: O n tap toan b6 chuang t r i n h da hgc, k h d n g hgc t u ,

hoc lech B a m sat yeu cdu, m i i c d6 cua t h i tuye'n sinh D a i hgc va Cao dang

Trong qua t r i n h on t h i cin nang cao kie'n thiic va k i nang c a ban, dong t h d i

nang cao kha nang suy luan, nang luc t u duy, sang tao

b) Mite do cdn dqt ve kien thitc, ki nang

- Ve kien thicc: Y e u ciw thf sinh phai nam v u n g , hie'u ban cha't, h i ^ u

sau cac kie'n thiic t r o n g chuang t r i n h va sach giao khoa

- Ve ki nang: V a n dung thanh thao cac kie'n thiic da hgc de' tra I d i cac

cau h o i hoac giai bai tap; c6 k l nSng tfnh toan, ve h i n h , d u n g bie'u d6

3 C a u true de thi tuyen sinh D a i hoe - C a o dang mon H o a hoe

I P H A N C H U N G C H O T A T C A T H I S I N H (40 eau)

So

So eau

1 Nguyen tir, bang tuSn hoan cac nguyen t6' hoa hoc, lien ke't hoa hgc 2

2 Phan l i n g o x i h o a - k h i i , t6'c d6 phan l i n g va can bang hoa hgc 2

7 ong hop noi dung cac kife'n thfrc hoa v6 ca thudc chuong trinh

15 Tdng hop noi dung cac kien thiic hoa hiru co thuoc chuong

I I PHAN RlftNG Ihi sink chi ditoc chon mot phdn rieng thich hffp

16 Toe do phan urng, can bang hoa hoc, su dien li 1

19 Crom dong, niken, chi, kem, bac, vang, thiec 2

20 Phan biet chat v6 CO, hoa hoc va va'n de phat tri^n kinh te', xa h6i,

24 Toe do phan i?ng, can bang hoa hoc, su dien li 1

27 Crom, dong, niken, ehi, kem, bac, vang, thiec 2

28 Phan hiet chat v6 co, ehuan dp dung dich, hoa hoc va van de

KHAI Q U A T

V E P H U O N G P H A P T R A C NGHlgM

Co hai loai trac nghifim:

- Trac nghiem tu luan (thu6ng goi tat la ttr luan)

- Trac nghiem khach quan (thucmg goi tat la trac nghiem)

Tide nghiem tu luan (cau hoi tu luan): Khi l^m bai, hoc sinh phai vie't

cau tra lofi, phai If giai, lap luan chiing minh bang kien thiJc ciia minh

Tide nghiem khdeh quan (cau hoi trac nghiem): Khi lam bai, hoc sinh

chi phai doc, suy nghi dd lua chon dap an dung trong s6' cac phuong an da cho Thdi gian danh cho m6i cau chi tCr 1 - 2 phut

Goi la tide nghiem khdch quan la do each cha'm die'm ra't khach quan

(thuorng la dung may tinh) Di^m dupe tinh bang each de'ra s6' Mn chon

dupe cau tra Icri diing

Cau hoi trac nghiem co 4 dang chinh:

1 Cau dien khuyet

G6m hai phdn:

- Phdn edu dan la nhung cau hoac phuong trinh hoa hoe, c6 nhiJng

ch6 eon bo trong (ghi bang cac da'u )

- Phdn tid Idi la nhung tCr, cum tCr, nhung cong thiic hoa hoc phai lua

chon va diin vao ch6 trS'ng cho phu hop

- Thi du: Trong nguyen tijf %C\x co (1) electron, (2) proton

va (3) natron

2 Cau phep doi

G6m hai phan:

- Phdn cdu dan b c6t thii nha't g6m m6t phdn ciia cau (cau chua hoan

thanh) hay mdt yeu cdu

- Phdn tid Idi 6 c6t thii hai g6m mdt phan con lai ciia cau hoac mCt dap an

ma ta phai ehpn de' ghep vdi c6t thii nha't thanh cau phu hcrp hoan chinh

- Thi du: Chon san ph^m phan ting b c6t thiJ hai ghep vdi cac cha't

phan u-ng of e6t thii nha't de' dupe phuong trinh hoa hoc phii hop hoan chinh:

Cot thvi nhat Cot thur hai D a p an

- Phan can dan la m o t cau c6 n 6 i dung c^n xac d i n h dung hay sal

- Phan lid Idi g6m chtr D (neu cho la diing) hay c h u S (neu cho la sai)

Khoanh t r o n m o t trong hai chiJ do k h i xac d i n h

- Thi du: H i d r o c a c b o n no chi tham gia phan ling the', kh6ng tham gia

phan ling c6ng D - S

Dap an S: H i d r o c a c b o n no n h u xiclopropan (hay x i c l o b u t a n ) c6 thi

tham gia p h i n n ling c6ng mcf vong

4 C a u n h i e u lira c h o n (hay diing nhat)

G o m hai phAn:

- Phan (du dan 1^ m 6 t cau hoi hoac mdt cau chua hoan thanh (cau bo

lirng), c3n ghep vdi m 6 t dap an di dugc cau hoan chinh

- Phan trd Idi g6m 4 hoac 5 phuomg an, phai chon phuong dn diing

(hay diing nha't, dSy du nhat)

- Thidu 1: Cho 20 gam h6n hop M g va Fe tac dung vdri d u n g d i c h H C l

d u thay c6 1 gam k h i H2 bay ra Neu dem c6 can dung d i c h sau phan ling

thi thu dugc bao nhieu gam mu6'i khan?

A 50 gam B 55,5 gam

C 60 gam D 60,5 gam

Hay chon dap an diing

Hit&ng ddn trd lai

- Cdch gidi thong thudng:

G o i X va y la so mol M g va Fe c6 trong 20 gam h6n hop

Cac phuong trinh phan ling:

Tir phan tir H C l - » U H = U d = j = 1 mol nguyen tic

N h u vay: 1 m o l nguySn t ^ H bay ra t h i cung phai c6 1 m o l nguyen tir

CI (hay 35,5 gam) tao mu6'i

m m u , i = mki + mj,.vc axi> = 20 + 35,5 = 55,5 (gam)

- Cdch gidi thong thiCdng:

G g i C T P T t r u n g b i n h ciia 2 ancol la CjiHjji+iOH

G g i x la s6' m o l ciia 2 ancol trong m 6 i phSn

X mol n X n X = 0,1 mol mHjO =0'1-18= l,8(gam)

Dap an D

- Cdcfi gidi nhanh: D6't chay phSn 1 thu dugc 0,1 mol CO2, phSn 2

bang s6' nguydn tir C trong ancol

-> S6' mol CO, khi d6't anken = s6' mol CO2 khi d6't ancol va bang s6' mol HjO

m„^o= = 1,8 gam

Chu y Khi lam bai tap t r k nghiem, vi khfing phai trinh bay each giai

nSn ta dung each giai nhanh (giai nhSlm) 6.i chon dap an diing

P H A N I

T U Y E N C H O N B A I T H I T R A C N G H I E M

T H E O C A U T R U C D E T H I

A PHAN CHUNG CHO TAT C A C A C THf SINH

- NGUYEN TLT, BANG TUAN HOAN, LIEN KET HOA HOC

1.1 Cho cac nguyen to M (Z = 11), X (Z = 17), Y (Z = 9) va R (Z = 19)

D6 am dien ciia cac nguyen to tang dSn theo thir tir

A M < X < Y < R B R < M < X < Y

C Y < M < X < R D M < X < R < Y

1.2 Trong tur nhien, nguyen to c6 hai dong vi la fgCu va 29Cu Nguydn tir

khoi trung binh cua dong la 63,54 Thanh phan phSn tram t6ng so

nguyen tir cua d6ng vi 29 Cu la

A 27% B 50%

C 54% D 73%

1.3 Trong hop chat ion XY (X la kim loai, Y la phi kim), s6' electron cua

cation bang s6' electron cua anion va t6ng s6' electron trong X Y la 20

Biet trong moi hop chat, Y chi c6 mdt miic oxi hoa duy nha't

C6ng thiic XY la

A MgO B LiF

C AIN D NaF

1.4 Trong phan ling d6't chay CuFeSz tao ra san pham CuO, FejOj va SO2

thi m6t phan tu CuFeSi se

A nhucmg 13 electron B nhan 12 electron

C nhan 13 electron D nhucrng 12 electron

1.5 Day g6m cac ion X^, Y" va nguySn tir Z ddu c6 ca'u hinh electron ls22s'2p*^ la

C.Na^F-,Ne D K \, Ar

1.6 Anion X" va cation Y^' d^u c6 cau hinh electron Idp ngoai cung la

Ss^Sp** Vj tri cua cac nguyen to trong bang tuSn hoan cac nguyen t6' hoa hoc la :

A X CO s6' thu- tu 17, chu ki 4, nhom VIIA

Y CO so thu- tu 20, chu ki 4, nhom IIA

li X CO so thi'r tir 18, chu k i 3, nhom V I A

Y CO so thir lif 20, chu k i 4, nhom l l A

C X CO so thi'r t u 17, chu ki 3, nhom V I I A

Y CO so ihir tir 20, chu k i 4, nhom I I A

D X CO so thi'r tir 18, chu k i 3, nhom V I I A

Y CO s6' thi'r t u 20, chu k i 3, nhom I I A

1.7 Nguyen tir cua nguyfin t6' X c6 cau hinh electron ls'2s^2p'^3s^3p'^4s',

nguyen tir cua nguydn to Y c6 citu hinh electron ls^2s^2p\

Lien kfi't hoa hoc giCra nguyen tir X va nguySn tir Y thudc loai I'ltn ket

A kirn loai B c6ng hoa t r i

C ion D cho - nhan

1.8 Nguyen tir cua nguyen to X c6 t6ng s6' hat electron trong cac phan

Idfp p la 7 So hat mang dien cua mot nguyfin tijr Y nhi^u hon so hat

mang dien cua mot nguyen lir X la 8 hat

Cac nguyen to X va Y lan l u m la

A F e v a C I B Na va C I

C A l va CI D A l va P

1.9 M o t nguyen tir cua nguyen to X c6 tdng so hat proton, natron, electron la

52 va CO so khoi la 35 S6' hieu nguyfin tu cua nguyen to X la

A 18 B 23

C 17 D 15

1.10 Nguyen tu ciia nguyen t6' X c6 electron a muc ni5ng lirgng cao nha't la 3p

Nguyen tu ciia nguyen to Y cung c6 electron cf mv!c nang lucmg 3p va c6

mot electron a \dp ngoai cdng Nguyen lir X va Y c6 so electron hon kem

nhau la 2 Nguyen to X, Y lan lugt la

A k i m loai va k i m loai B phi kirn va k i m loai

C k i m loai va khf hiem D khi hiS'm va k i m loai

1.11 Cho cac nguyen to: K (Z = 19), N (Z = 7), Si (Z = 14), M g (Z = 12) Day

g6m cac nguyen 16' dupe sdp x6'p theo chieu giam dan ban ki'nh nguyen tuf

tir trai sang phai la

A M g , K , S i , N B K , M g , S i , N

C K, M g , N , Si D N , Si, M g , K

1.12 Nguyen lir ciia nguyen to X c6 cau hlnh electron ngoai cung la ns'^np''

Trong hop chat khi ciia nguyen 16' X \'6i hidro, X chifi'm 94,12% khoi

lupng Phdn tram khoi lirpng cua nguyen t6' X trong oxit cao nha't la

A 50,00% B 40,00%

C 27,27% > - D 60,00%

1.13 Ca'u hinh electron cua ion X^* la ls^2s^2p^3s^3p^3d^ Trong bang tuSn hoan cac nguyen to hoa hpc, nguyen t6' X thupc

A chu k i 4, nhom I I A B chu k i 4, nhom V I I I B

C chu k i 4, nhom V I I I A D chu k i 3, nhom V I B

1.14 Nhan djnh nao sau day dung khi noi v6 3 nguyen tijr: ^3 X , 26 Y , ^^Z ?

A X va Y CO cung s6' notron

B X, Z la 2 d6ng vi ciia ciing m6t nguyfen t6' hoa hpc

C X, Y thu6c Cling m6t nguyen t6' hoa hpc

p X va Z CO ciing s6' kh6'i

1.15 Cac nguyen t6' tir L i de'n F, theo chi^u tang ciia dien tich hat nhan thi

A ban ki'nh nguyen t u va d6 am dien d^u giam

B ban kinh nguyen tu va d6 am dien d^u tang

C ban kinh nguyen tii giam, d6 am dien tang

D ban kinh nguyen t u tang, d6 am dien giam

1.16 Cac chat ma phan t u khong phan cue la

A HBr, CO2, CH4 B CI2, CO2, Q H j

C NH3, Br^, C2H4 D H C l , C2H2, Br2

1.17 M 6 t ion M'^co t6ng s6' hat proton, natron, electron la 79, trong do s6' hat

mang dien nhi^u hon s6' hat khdng mang dien la 19

Ca'u hinh electron cua nguyen tir M la

A [ A r ] 3 d H s ' B [ A r ] 3 d M s l

C [Ar]3d'*4s' D [Ar]3dMsl

1.18 Cac k i m loai X, Y, Z c6 ca'u hinh electron nguyen tijr lAn lupt la:

ls^2s^2p'3s'; ls'2s^2p^3s^ ls^2s^2p'3s^3p' Day g6m cac k i m loai xe'p

theo chieu tSng ddn tinh khi'r tiJr trai sang phai la

A Y , Z , X B Z , X, Y

C X , Y , Z D Z , Y , X

1.19 Day g6m cac k i m loai c6 ca'u tao mang tinh the lap phuong tarn khd'i la

A L i , Na, K B Be, M g , Ca

C L i , N a , C a D Na, K, M g

1.20 Lien ket hoa hpc giiJa cac nguyen til trong phan njr H2O la lien ke't

A c6ng hoa trj khong phan cue B hidro

C cpng hoa tri phan cue D ion

2 P H A N UNG OXI H O A - KHLT, T O C D O P H A N UNO

Khi tang ndng d6 ciia hidro Ifin 2 l^n, t6'c d6 phan ling thuan

A tang len 8 Ian B giam di 2 iSn

C tang len 6 iSn D tang Itn 2 l^n

2.3 Cho cac phan ung xay ra sau day :

(1) AgNOj + Fe(N03)2 -» Fe(N03)3 + Ag>l^

(2) Mn + 2HCI MnClj + H21

Day cac ion sap xfi'p theo chi6u tang dSn tfnh oxi hoa la

A ,Ag+, Fe3+, H+ , M n 2 +. B Ag+ , Mn^^, H+ , Fe^+

C M n 2 + , H+ , Ag+, Fe^^ D Mn^^, H+ , Fe^+, Ag+

2.4 T6ng he s6' (cac so nguyen, t6'i gian) ciia tat ca cac chat trong phuomg

trinh phan ling giua Cu vdri dung djch HNO, dac, nong la

A 10 B 11

C.8 D.9

2.5 Cho can bang hoa hoc: 2 SOj (k) + O2 (k) <=:± 2 SO3 (k)

phan ung thuan la phan ling toa nhiet

Phat bie'u dung la:

A can bang chuydn djch theo chi^u nghich khi giam n6ng do SO3

B Can bang chuyen dich theo chieu thuan khi giam ap suat he phan ling

C can bang chuyen dich theo chieu nghich khi giam n6ng do O2

D can bang chuyg'n dich theo chieu thuan khi tang nhiet d6

2.6 Cho can bang hoa hoc: N2 (k) + 3H2 (k) ^-=± 2NH3(k); phan ung

thuan la phan ling toa nhiet

can bang hoa hoc khong bi chuyS'n djch khi

A thay doi ap sua't he B thay doi nong dd N2

C thay doi nhiet do D them chat xiic tac Fe

;.7 Cho cac can bang hoa hoc:

N2 (k) + 3 H2 (k) < > 2 NH3 (k)

H2 (k) + l2 (k) ^ 2S02(k)+ 02(k)

± 2HI(k) 2S03(k) 2N02(k) < > N204(k)

(1) (2)

(3)

(4) Khi thay d6i ap sua't, nhung can bang hoa hoc bi chuyen dich la

A (1), (2), (3) B (2), (3), (4)

C.(l),(3),(4) D.(l),(2),(4) 2.8 Cho phan ung hoa hoc:

Fe + C U S O 4 FeS04 + Cu Trong phan ung trSn xay ra:

A str khtr Fe^"^ va sir oxi hoa Cu

B sir khur Fe^+ va su khir Cu^+

C su oxi hoa Fe va su oxi hoa Cu

D su oxi hoa Fe va su khur Cu^^

2.9 Cho cac can bang sau:

xt,t"

(1) 2S02(k) + 02 (k) (2) N2 (k) + 3H2 (k) ^

± 2S0., (k)

xt,t

± 2NH3 (k) (3) CO, (k) + n, (k) ± CO (k) + H2O (k) (4) 2HI (k) ± H2 (k) +12 (k)

Khi thay d6i ap sua't, nhom gdm cac can bang hoa hoc d^u khong bi chuye'n dich la

(d) 2HC1 + Zn > ZnCl2 +

S6' phan ung trong do HCl the hien ti'nh khii

A 4 B 3

C 2 D 1

2.11 Cho chat xuc tac M n 0 2 vao 100 ml dung dich H2O2, sau 60 giay thu duoc

33,6 m l khi Oj (cr dktc) T6'c do trung binh ciia phan ung (tinh theo H2O2)

trong 60 giay tren la

A 5,0.10' moV (/.s) B 5,0.10^ mol/ (/.s)

C 2,5.10-^ mol/ (Is) D 1,0.10'' mol/ (/.s)

2.12 Cho day cac chat va ion: Zn, S, FeO, SOj, N2, HCl, Cu'% Cr So chat va

ion CO ca tinh oxi hoa va tinh khir la

A 6 B.5

C 7 D 4

2.13 Cho can bang: 2SO2 (k) + O2 (k) < > 2SO, (k)

Khi tang nhiet d6 thl ti khdi cua h6n hop khi so vdi H2 giam di Phat bi^u

dung khi noi v6 can bang nay la:

A Phan utig thuan toa nhiet, can bang dich chuyin theo chi^u nghich khi

tang nhiet d6

B Phan ling nghich thu nhiet, can bang dich chuyfi'n theo chi6u thuan khi

tang nhiet dp

C Phan ling nghich toa nhiet, can bang dich chuyfin theo chi6u thuan khi

tang nhiet do

D Phan ung thuan thu nhiet, can bang dich chuydn theo chieu nghich khi

2.15 Cho X mol Fe tan hoan toan trong dung dich chiia y mol H2SO4 (ti 16 x : y

= 2 : 5 ) , thu duoc mot san phaim khu duy nha't va dung dich chi chira mu6'i

sunfat S6' mol electron do luong Fe tren nhucmg khi bi hoa tan la

A 2x B 3x

C y D 2 y

2.16 Cho phan ung: 2C6H5-CHO + KOH ^ CfiHs-COOK + CfiHs-CHj-OH

Phan ung nay chung to CfiH^-CHO:

A vira the hifin tinh oxi hoa, vira the hien tinh kh\i

B chi th^ hien tinh oxi hoa

C chi th^ hien tinh khur

D khong the hien tinh khu va tinh oxi hoa

2.17 Cho cac can bang sau:

(I) 2 H I ( k ) < = ± H2(k) + l2(k);

(II) CaCO, (r) < = > CaO (r) + CO2 (k);

(III) FeO (r) + CO (k) < > Fe (r) + CO2 (k);

(IV) 2S02(k) + 02(k) < > 2SO;(k)

Khi giam ap suat ciia he, s6' can bang bi chuye'n dich theo chieu nghich la

A 4 B 3

C 2 D 1

2.18 Cho can bang hoa hoc: PCI, (k) < > PCI3 (k) + CI2 (k); AH > 0

c a n bang chuyen djch theo chieu thuan khi

A tang ap suat ciia he phan ung B tang nhiet do cua he phan ung

C them PCI3 vao he phan ung D them CI2 vao he phan ung

2.19 Cho phan ung:

NajSO, + KMn04 + NaHS04 ^ Na2S04 + MnS04 + K2SO4 + H2O

Tdng he s6' ciia cac cha't (la nhCing so nguyen, t6'i gian) trong phuong trinh phan ling la

C S + 6 H N 0 , (dac) — ^ H2SO4 + 6NO2 + 2H2O

D 4S + 6NaOH(dac) — ^ 2Na2S + Na2S203 + 3H2O

3.2 Trong so cac dung dich : NâCO,, KCl, CH^COONa, NH4CI, NaHS04,

QHsONạ Nhifng dung dich c6 pH > 7 la

Ạ NaoCO,, QH.ONa, CH,COONạ

B NajCO,, NH4CỊ KCl

C KCl, CftH,ONa, CH,COONạ

D NH4CI, CH.COONa, NaHS04

3.3 Khi cho 100 ml dung dich KOH I M vao 100 ml dung djch HCl thu duoc

dung djch c6 chiia 6,525 gam chat tan N6ng dO mol (hoac mol/1) ciia

HCl trong dung dich da dung la

Ạ0,75M B I M

C.0,25M D.0,5M

3.4 Mot dung dich chiia 0,02 mol Cu^^ , 0,03 mol K"", x mol CP va y mol

S04~ Tong khdi luong cac mudi tan c6 trong dung dich la 5,435 gam

Gia tri cija x va y Ian luot la

Ạ 0,03 va 0,02 B 0,05 va 0,01

C 0,01 va 0,03 D 0,02 va 0,05

3.5 Day g6m cac chat deu lam quy tim am chuyen sang mau xanh la

Ạ metyl amin, amoniac, natri axetat

B amoni clorua, metyl amin, natri hidroxit

C anilin, metyl amin, amoniac

D anilin, amoniac, natri hidroxit

3.6 Dung dich HCl va dung dich CH3COOH c6 cung nong d6 mol, pH cua

hai dung dich tuong ung la x va ỵ Quan he giua x va y la (gia thiét, ci[

100 phan tu CH3COOH thi c6 1 phan tiJ dien li)

Ạ y = lOOx B y = 2x

C y = x - 2 D y = x + 2

3.7 Tron lan V ml dung dich NaOH 0,0IM v6i V ml dung dich HCl 0,03M

duoc 2V ml dung dich Ỵ Dung dich Y c6 pH la

3.9 Tron 100 ml dung dich c6 pH = 1 g6m HCl va HNO, vdi 100 i il dung

dich NaOH ndng dO a (mol//), thu duoc 200 ml dung dich c6 pH - !2

Gia tri cua a la (biet trong moi dung dich [H^][OH ] = j O""*)

Ạ 0,15 B 0,30

C 0,03 D 0,12

3.10 Cho cac dung djch c6 ciing nong do: Na2C03(l), H2SO4 (2), ÍCI (3), KNO3 (4) Gia tri pH cua cac dung djch duoc sap xep theo chili; ang tCr trai sang phai la

Ạ (3), (2), (4), (1) B (4), (1), (2), (3)

C (1),(2).(3),(4) D.(2),(3),(4),(l)

3.11 Nho tir ttr 0,25 lit dung dich NaOH 1,04M vao dung dich gdm 0,024 mol

FeCl,; 0,016 mol Al2(S04), va 0,04 mol H2SO4 thu duoc m gam kel tiiạ Gia tri ciia m la

Ạ 2,568 B 1,560

C 4,128 D 5,064

3.12 Day g6m cac ion (khOng ki 6€n su phan l i cua nude) ciing t6n tai trong

mot dung dich la

Ạ A l ' ^ N H ^ , Br , O H

^2-

PC

3-B Mg^^ K ^

sô-c H ^ Fé^ NO3, sỗ D A g ^ Na\, c r

3.13 Tron 100 ml dung dich h6n hop gom H2SO4 0,05M va HCl 0,1M vdi 100 ml

dung djch h6n hop gom NaOH 0,2M va BăOH)2 0,1M, thu duoc dung djch X Dung djch X c6 pH la

Ạ 12.8 B 13,0

3.14 Dung dich X chiia hdn hop g6m NâCO, 1,5M va KHCO, I M Nho tiir tir

timg giot cho den het 200 ml dung djch HCl I M vao 100 ml dung djch X,

sinh ra V lit khi (0 dktc) Gia trj ciia V la

Ạ 3,36 B 1,12

C 4,48 D 2,24

3.15 D6't chay hoan toan m gam h6n hop 3 ancol don chirc, thuOc ciiiii, day

d6ng dang, thu duoc 3,808 lit khi CO2 (dktc) va 5,4 gam H2Ọ

Gia trj cCia m la

Ạ 5,42 B 4,72

C 7,42 D 5,72

3.16 Dung djch X c6 chiia: 0,07 mol Na"^; 0,02 mol SO4 va x mol OH Dung

djch Y CO chiia C I O 4 , N O 3 va y mol tdng s6' mol C I O 4 va N O 3 la

0,04 Tr6n X va Y duoc 100 ml dung dich Z Dung djch Z c6 pH (bo qua

su difin li cua HjO) la

A 2 B 13

C 1 D 12

3.17 Cho dung dich Ba(HC03)2 Ian luot vao cac dung dich: C a C l 2 , Ca(NO,)2,

NaOH, Na^CO,, K H S O 4 , Na2S04, Ca(OH)2, H2SO4, HCl

S6' trucfng hop c6 tao ra ket tua la

A 4 B 7

C 5 D 6

3.18 Phat bieu nao sau day khong diing?

A Trong cac dung djch: HCl, H2SO4, H2S c6 cung ndng dd 6 ,01 M , dung

dich HjS CO pH Ion nha't

B Nho dung djch N H 3 tir tCr tofi du vao dung djch C U S O 4 , thu dugc kfi't

tua xanh

C Dung djch NajCO^lam phenolphtalein kh6ng mau chuyen sang mau h6ng

D Nho dung dich NH3 ti^ lit tori du vao dung djch A I C I 3 , thu duoc ke't

tua trSng

3.19 Cho 150 ml dung djch KOH 1,2M tac dung vdi 100 ml dung djch A I C I 3

n6ng d6 x mol//, thu dugc dung djch Y va 4,68 gam ket tua Loai bo ket

tua, them tie'p 175 ml dung djch KOH 1,2M vao Y, thu dugc 2,34 gam ket

tiia Gia trj ctia x la

A 1,2 B.0,8

C.0,9 D 1,0

3.20 Hoa tan h6n hgp g6m: KjO, BaO, AI2O3, Fe304 vao nude (du), thu dugc

dung dich X va chat ran Y Sue khf COj de'n du vao dung djch X, sau khi

cac phan lirng xay ra hoan toan thu dugc kfi't tua la

A K2CO3 B BaCO,

C Fe(OH), D Al(OH)v

4 PHI KIM (cacbon, silic, nito, photpho, oxi, lini huynh, halogen)

4.1 Cho khi CO (du) di vao ong sii nung nong dung h6n hgp X g6m AljO,,

MgO, Fe304, CuO thu dugc chat ran Y Cho Y vao dung djch NaOH (du),

khuat kT, thay con lai phSn khong tan Z Gia six cac phan ung xay ra hoan

toan PhSn kh6ng tan Z gom

A MgO,Fe,Cu B Mg, Fe, Cu

C MgO, Fe304 , Cu D Mg, A l , Fe, Cu

C NaN03 va H 2 S O 4 dac D NaNOj vk HCl dac

Trong phong thf nghiem, 6i d\6u ch6 m6t lugng nho khf X tinh khiet, ngu&i

ta dun nong dung djch amoni nitrit bao hoa Khf X la

A NO B N O 2 C.N2O D.N2

Trong phong thi nghidm, ngucfi ta thuomg dieu che clo bang each

A dien phan nong chay NaCl

B cho dung djch HCl dac tac dung vol M n 0 2 , dun n6ng

C dien phan dung djch NaCl c6 mang ngan

D Cho F2 My CI2 ra khoi dung djch NaCl

Ha'p thu hoan toan 4,48 1ft khf CO2 (cr dktc) vao 500 ml dung dich h6n hgp NaOH 0,1M va Ba(0H)2 0,2M, sinh ra m gam ket tua

Cac khf X , Y , Z thu dugc l&n luot la

Ạ SO3 , NO, NH3 B. SO2 , N2, NH3

C. SO2 NO, C O 2 D. SO3 , N 2 , C O 2

4.9 C6ng thirc pbftn tu ciia hop chat khi tao bdi nguy6n t6' R va hidro la RH3

Trong oxil ma R c6 so iioa tri cao nhat thi oxi chiem 74,07% ve kh6'i

, luong Nguyen t6' R la

ẠS B A s

C N D P

4.10 Cho 0,1 mol P2O5 vao dung djch chiia 0,35 mo! KOH Dung djch thu

duoc CO cac chát:

Ạ K3PO4, K2HPO4 B K 2 H P 0 4 , K H 2 P 0 4

C. K3PO4, KOH D H3PO4, KH2PO4

4.11 Dung djch X chira cac ion: Fê+, SỖ, NH4 , CF Chia dung djch X

thanh hai phan bang nhau:

- Phfin mot tac dung vdi lirong dir dung djch NaOH, dun nong thu durgc

0.672 lit khf (o dktc) va 1,07 gam ket tua;

- PhSn hai tac dung vcfi krong du dung djch BaCl^, thu duoc 4,66 gam ket tiiạ

T6ng khoi iuong cac mudi khan thu dupe kiii c6 can dung djch X la (qua

trlnh CO can chi c6 nude bay hoi):

Ạ 3,73 gam B 7,04 gam

C 7,46 gam D 3,52 gam

4.12 I r o n 5,6 gam bot sat vol 2,4 gam b6t luu huynh r6i nung nong (trong dieu

kien khong c6 khong khi), thu dugc h6n hop ran M Cho M tac dung v6\

lugng du dung djch HCl, giai phong h6n hop khi X va con lai m6t ph^n

khong tan G De dot chay hoan toan X va G cSn vira du V lit khf O, (d

dktc)

Gia trj cua V la

Ạ 4,48 B 3,36

C.'2,80 ' D 3,08

4.13 Chat khi X tan trong nude tao ra m6t dung djch lam chuyen mau quy tfm

thanh do va c6 th6 dugc dung lam chát tay maụ Khf X la

4.14 Khi nhiet phan hoan toan 100 gam m6i chat saiK KCIO3 (xiic tac MnOj),

KMn04, KNO3 va AgNO,, chat tao ra lugng O21dm nhat la

Ạ KMn04 B KNO,

C. KCIO3 D AgNOj

4.15 Cho 0,448 lit khf COj (of dktc) háp thu hét vao 100 m l dung dich chira h6n

hgp NaOH 0,06M va BăOH)2 0,12M, thu dugc m gam ket tiiạ

Gia trj cua m la

Ạ 1,970 B 1,182

C 2,364 D 3,940

4.16 Hoa tan hoan toan 8,94 gam h6n hgp g6m Na, K va Ba vao nucSc, thu

dugc dung djch X va 2,688 1ft khf Hj (dktc) Dung djch Y g6m HCl va

H2SO4, ti le mol tuong irng la 4 : 1 Trung hoa dung djch X bdi dung djch

Y, tong khdi lugng cac mudi dugc tao ra la

Ạ 18,46 gam B 12,78 gam

C 14.62 gam D 13,70 gam

4.17 Cho m gam NaOH vao 2 1ft dung djch NaHCO, ndng đ a mol//, thu dugc

2 1ft dung djch X Láy 1 1ft dung djch X tac dung vdi dung djch BaCl,

(du) thu dugc 11,82 gam ket tiiạ Mat khac, cho 1 1ft dung djch X vao dung djch CaClj (du) rdi dun ndng, sau khi kdt thiic cac phan ling thu dugc 7,0 gam kdt tiiạ Gia trj ciia a, m tuong ling la

Ạ 0,04 va 4,8 B 0,07 va 3,2

C 0,08 va 4,8 D 0,14 va 2,4

4.18 Nho tir tir dung djch NaOH den du vao dung djch X Sau khi cac phan

irng xay ra hoan toan chi thu dugc dung djch trong sudt

Chat tan trong dung djch X la

4.19 Hap thu hoan toan 3,36 1ft khf CO2 (dktc) vao 125 ml dung dich Bă0H)2

I M , thu dugc dung djch X Coi th^ tfch dung djch khdng thay đi, ndng

đ mol cua chát tan trong dung djch X la

Ạ 0,6M B 0,4M

C 0,2M D 0,1M

4.20 Cho 0,015 mol radt loai hgp chat oleum vao nude thu dugc 200 ml dung

dich X Dé trung hoa 100 m l dung djch X cSn diing 200 m l dung djch NaOH 0,15M Ph^n tram ve khdi lugng ciia nguygn td luu Imynh trong oleum tren la

Ạ 32,65% B 23,97%

C 35,95% D 37,86%

5 DA) CUONG VE K I M LOAI

5.1 ThiT tir m6t s6' cap chat oxi hoa - khir trong day dien hoa nhu sau :

Fe^^/Fe ; Cu^+ZCu ; Fc^-"/Fe^*

Cac cap ch?rt kh6ng phan irng v6i nhau la

A Fe va dung dich CuC);

B Fe va dung dich FCCI3

C dung djch F e C l 2 va dung dich C U C I 2

D Cu va dung dich FeCls

5.2 Cho 1,67 gam hOn hop hai kim loai d hai chu ki lien tiep thuOc nhom

IIA (phan nhom chi'nh nhom II) tac dung he't v6i dung dich HCl (du),

thoat ra 0,672 lit khi H2 (cr dktc) Hai kim loai do la

A MgvaCa B Cava Sr

C Be va Mg D Sr va Ba

5.3. Dicn phan dung dich chi'ra a mol CUSO4 va b mol NaCl (vdi dien cue tro,

CO inarg ngan xdp) Di dung dich sau dien phan Ihm phenolphtalein

chuyen sang mau hong thi dieu kien cua a va b la (bie't ion 804" khdng bi

dien phan trong dung dich)

A ^ 2 b - a B b < 2 a

C b = /a b b > 2 a

5.4 Co 4 dimg dich rieng biet: HCl, CuO„ FeCl,, HCl c6 iSn CuClj Nhiing

vao mOi dung dich mot thanh Fe nguyen cha't S6' trucmg hop xuat hien an

mon dien hoa la

A.O B 1

C 3 D 2

5.5 Day cac ion xep theo chieu giam dan tinh oxi hoa la (bie't trong day dien

hoa, cap Fe^^/Fe^^ diing trudc cap Ag+/Ag) :

A Ag+ , Cu2+ , F e 3 + , Fe2+ B Fe^^ , C u 2 ^ Ag+ , Fe^^

C A g ^ Fe3+ , C u 2 \+ D Fe^^, Ag^ , Cu^^ , Fe^^

5.6 Dien phan dung dich CuClj v6i dien cue tro, sau mOt thdi gian ihu duoc

0,32 gam Cu 6 catOt va mot luong khi X b anOt Hap thu hoan toan

luong khi X tren vao 200 ml dung dich NaOH (6 nhiet do thirdng) Sau

phan ling, nong do NaOH con lai la 0,05M (gia thiet thd tich dung dich

khong thay dOi) Nong do ban dSu ciia dung dich NaOH la

A 0,15M B 0,2M

C.0,1M D.0,05M

5.7 Khi dien phan NaCl nong chay (dien cue tro), tai catOt xay ra

A su oxi hoa ion C r B su oxi hoa ion Na*

C su khir ion C r D su khtr ion Na"^

5.8 Nhiet phan hoan toan 34,65 gam h6n hop g6m KNQ, va Cu(N03)2, thu

dugc hOn hop khi X (ti khdi cua X so vdfi khi hidro bang 18,8)

KhO'i luong Cu(NO,)2 trong hOn hcfp ban dAu la

A 20,50 gam B 11,28 gam

C 9,40 gam D 8,60 gam

5.9 Kim loai M phan ling duoc vdi dung dich HCl, dung dich Cu(N03)2

-dung dich HNO3 (dac, nguOi)

Kim loai M la

A A l B Zn

C Fe D Ag

5.10 D6't chay hoan toan 7,2 gam kim loai M (c6 hoa tri I I khdng doi trong

hop cha't) trong h6n hop khi CI2 va Oj Sau phan ung thu dugc 23,0 gam

cha't ran va the tich h6n hop khi da phan umg la 5,6 lit (b dktc)

Kim loai M la

A Mg B Ca

C Be D Cu

5.11. Dien phan c6 mang ngan 500 ml dung djch chiia h6n hop g6m C U C I 2

0,1M va NaCl 0,5M (dien cue tro, hieu suat dien phan 100%) vdi cuong

do dong dien 5A trong 3860 giay Dung dich thu dugc sau dien phan c6 kha nang hoa tan m gam A l Gia tri Idn nha't cua m la

A 5,40 B 4,05 C.2,70 D 1,35

5.12. Dien phan nong chay A I 2 O 3 vdi anot than chi (hieu suat dien phan 100%)

thu dugc m kg Al d catot va 67,2 m^ (d dktc) hdn hgp khi X cd ti khdi so vdi hidro bang 16 La'y 2,24 lit (d dktc) hdn hgp khi X sue vao dung dich

nude v6i trong (du) thu dugc 2 gam ket tiia Gia tri cua m la

A 67,5 B 54,0

C 75,6 D 108,0

5.13 Cho cac hgp kim sau: Cu-Fe (I); Zn-Fe (II); Fe-C (III); Sn-Fe (IV) Khi

tie'p xuc vdi dung dich chat dien li thi cac hgp kim ma trong do Fe deu bi

an mdn trudc la

A I , I I va IV B I , I I I va IV

C I , I I va I I I D I I , III va I V

91^

5.14. Phan Ling dien phan dung djch CuClj (vdi dien cue tra) va phan irng an

mon dien hoa xay ra khi nhiing hop kim Zn-Cu vao dung djch HCl c6 dac

diem la:

A Phan ung 6 cue am eo sir tham gia cua kim loai hoac ion kim loai

B Phan ling xay ra lu6n kem theo sir phat sinh dong dien

C Deu sinh ra Cu a cue am

D Phan ung a cue duong deu la sir oxi hoa CI

5.15 Cho 19,3 gam h6n hop hot gom Zn va Cu c6 ti le mol tucfng ung la 1 : 2

vao dung dich chua 0,2 mol Fe2(S04), Sau khi cac phan ling xay ra hoan

loan, thu ducfc m gam kim loai Gia tri cua m la

A 12,00 B 16,53

C 6,40 D 12,80

5.16 Nung 2,23 gam h6n hop X gom cac kim loai Fe, Al, Zn, Mg trong oxi,

sau mot thai gian thu duac 2,71 gam h6n hop Y Hoa tan hoan toan Y vao

dung dich UNO, (du), thu duac 0,672 lit khi NO (san pham khir duy nhat,

a dktc) So mol HNO, da phan ling la

A 0,12 B.0,14

C 0,16 D 0,18

5.17. Dien phan (vdi dien cue tra) 200 ml dung dich CUSO4 n6ng do x mol//,

sau mot thori gian thu dugc dung dich Y vSn con mau xanh, c6 khdi lugng

giam 8 gam so vdi dung dich ban d^u Cho 16,8 gam hot sdt vao Y, sau

khi cac phan ling xay ra hoan toan, thu dugfc 12,4 gam kim loai Gia tri

ciia X la

5.18. Cho dung djch X chiia KMn04 va H2SO4 (loang) Mn luat vao cac dung

djch: FeClj, FeS04, CUSO4, MgS04, HjS, HCl (dac)

So truofng hop c6 xay ra phan ling oxi hoa - khir la

5.19 Cho biet thiJ tu tir trai sang phai ciia cac cap oxi hoa - khir trong day di6n

hoa (day the' dien cue chuSin) nhu sau: Zn^YZn; Fe^^/Fe; Cu^VCu;

Fe'^e^^; AgVAg

Cac kim loai va ion d^u phan ung duoc vdi ion Fe^"^ trong dung dich la:

A Zn, Ag^ B Zn, Cu'^

C Ag, Fe'\ Ag, C\i^\

6 KIM LOAI KIEM, KIM LOAI KIEM THO, NHOM, SAT

6.1 Cho mot mau hop kim Na-Ba tae dung vdi nude (du), thu duac dung dich

X va 3,36 lit H2 (or dktc) The tieh dung djch axit H2SO4 2M can dung de trung hoa dung dich X la

A 150 ml B 75 ml

C 60 ml D 30 ml

6.2 ITiem m gam kali vao 300 ml dung dich chiJa Ba(OH)2 0,1M va NaOH

0,1M thu duoc dung djch X Cho tir tir dung dich X vao 200 ml dung dich

Al2(S04)3 0,1M thu dugc ke't tua Y. Di thu dugc lugng ket tiia Y Idn nha't thi gia tri ciia m la

A 1,59 B 1,17

C 1,71 D 1,95

6.3 Hoa tan hoan toan 3,22 gam h6n hgp X g6m Fe, Mg va Zn bang mot

lugng vira du dung dich H2SO4 loang thu dugc 1,344 lit hidro (dktc) va dung dich ehufa m gam mudi Gia tri ciia m la

A 9,.52 B 10,27

C 8,98 D 7,25

6.4 Cho kim loai M tac dung vdi CI2 dugc mudi X ; cho kim loai M tac dung

vdi HCl dugc mudi Y Neu cho kim loai M tac dung vdi mudi X ta cQng dugc mudi Y Kim loai M cd the la

A Mg B.Zn

C Al D Fe

6.5 Hoa tan hoan toan hdn hgp X gdm Fe va Mg bang mdt lugng viJa dii

dung dich HCl 20%, thu dirge dung djch Y Ndng do cua FeClj trong dung dich Y la 15,76% Ndng dd phfin tram eiia MgClj trong dung dich Yla '

A 24,24% B 11,79%

C 28,21% D 15,76%

6.6 Cho 4,48 lit khf CO (dktc) tiir tir di qua dng nung ndng dung 8 gam mdt

oxit sat den khi phan ling xay ra hoan toan Khi thu dugc sau phan ung cd

ti khdi so vdi hidro bang 20 Cdng thiic ciia sat oxit va phSn tram the ti'ch ciia khi CO2 trong hdn hgp khf sau phan ling la

A FeO; 75% " B Fe203 ; 75%

C FcjOj ; 65% D Fe304 ; 75%

6.7 Cho hdn hgp X gdm Mg va Fe vao dung dich H2SO4 dac, ndng den khi

phan I'mg xay ra hoan toan, thu dugc dung dich Y va mdt phSn Fe khdng

tan Chat tan cd trong dung dich Y la

A MgS04va FeS04 B MgS04

C MgS04 va Fe2 (SO4 )3 D MgS04 , Fez (SO4 )3, FeS04

6.8 Nung 13,4 gam h6n hop 2 mu6'i cacbonat cua 2 kirii loai hoa tri I I , thu

duoc 6,8 gam chat ran va khi X Luong khi X sinh ra cho ha'p thu vao

75ml dung dich NaOH I M , kh6'i luong mu6i khan thu dugc sau phan

iJng la

A 4,2 gam B 5,8 gam

C 6,3 gam D 6,5 gam

6.9 Cho h6n hop Fe, Cu phan ung vdi dung dich H N O , loang Sau khi phan

ling hoan loan, thu diroc dung dich chi chiia m6t cha't tan va k i m loai du

Chat tan do la

A H N O 3 B Fe(N03)2

C Cu(N03)2 D Fe(N03)3

6.10 Cho 6,72 gam Fc vao dung dich chua 0,3 mol H2SO4 dac, nong (gia thiS't SO2

la san pham khijr duy nhat) Sau khi phan ung xay ra hoan toan, thu duoc

A 0,03 mol Fe2 (804)3 va 0,06 mol FeS04

B 0,02 mol Fe2 (804)3 va 0,08 mol FeS04

C 0,12 mol FeS04

D 0,05 mol Fe2 (SO4 )3 va 0,02 mol Fe dir

6.11 Nung m gam b6t sat trong oxi, thu dugc 3 gam h6n hop cha't ran X Hoa

tan het h6n hop X trong dung dich H N O , (du), thoat ra 0,56 1ft (6 dktc)

NO (la san ph^im khu duy nhat) Gia tri cua m la

A 2,62 B 2,32

C 2,52 D 2,22

6.12 H6n hop X g6m Na va A l Cho m gam X vao m6t lucmg du nudrc thi thoat

ra V 1ft khf Neu cung cho m gam X vao dung dich NaOH (du) thi thu

dugc 1,75 V 1ft khf Th&nh phitn ph^n tram theo khd'i lugng ciia Na trong

X la (biet the tfch khf do d cung di^u kien)

A 29,87% B 39,87%

C 49,87% D 77,31%

6.13 Cho 200 m l dung dich A l C l , 1,5M tac dung vdi V l i t dung dich NaOH

0,5M, lugng ket tua thu dugc la 15,6 gam

Gia tri lorn nhat ciia V la

A 2 B 2,4

C 1,2 D 1,8

6.14 Hoa tan hoan toan h6n hgp gdm 0,12 mol FeS2 va a mol CujS vao axit

HNO, (vira dii), thu dugc dung djch X (chi chua hai muO'i sunfat) va khi

duy nhat NO Gia tri cua a la

A 0,04 B 0,075

CO, 12 D.0,06

1 0

6.15 Trgn dung dich chiia a mol A l C l , vdi dung djch chira b mol NaOH D6

thu dugc k€t tua thi cSn c6 ti 16

A a : b = l : 4 B a : b < l : 4

C a : b = I : 5 D a : b > l : 4

6.16 Hoa tan 5,6 gam Fe bang dung dich H2SO4 loang (du), thu dugc dung djch X Dung dich X phan ling viia dii vdi V m l dung dich KMn04 0,5M Gia trj cua V la (cho Fe = 56)

A 8 0 B 40

C 20 D 60

6.17 Cho 11,36 gam h6m hgp g6m Fe, FeO, Fe203 va FC3O4 phan ung hd't

vdri dung dich HNO3 loang (du), thu dugc 1,344 1ft khf NO (san phdm

khu duy nhat, a dktc) va dung dich X C6 can dung dich X thu dugc m

gam muoi khan Gia tri cua m la

A 35,50 B 34,36

C 49,09 D 38,72

6.18 Hoa tan hoan toan 0,3 mol h6n hgp g6m A l va AI4C3 vao dung dich KOH (du), thu dugc a mol h6n hgp khf va dung dich X Sue khf CO2 (du) vao dung dich X , lugng ket tiia thu dugc la 46,8 gam

Gia tri cua a la

A 0,55 B 0,60

C 0,45 D 0,40

6.19 Cho 2,13 gam h6n hgp X gdm ba kim loai la M g , Cu va A l 6 dang b6t tac

dung hoan toan vdi oxi, thu dugc hdn hgp Y gdm cac oxit c6 khdi lugng 3,33 gam

The tfch dung dich HCl 2 M vira dii de phan ung het vdri Y la

A 50 ml B 57 ml

C 75 ml D 90 m l

6.20 D6 hoa tan hoan toan 2,32 gam hdn hgp gdm FeO, Fe304 va Fe20, (trong do

sd mol FeO bang sd mol Fe203), c^n dung vua dii V 1ft dung djch HCl I M

Gia tri cua V la:

A 0,16 B.0,18

C 0,23 D 0,08

6.21 Cho hdn hgp gdm Na va A l cd t i le sd mol tuong ling 1 : 2 vao nude (du)

Sau khi cac phan ung xay ra hoan toan, thu dugc 8,96 1ft khf H2 (d dktc)

va m gam chat ran kh6ng tan

Gia tri ciia m la

A 5,4 B 7,8

C 10,8 D.43,2