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gii chi tit thi th i hc - m 592Cu 1. Nguyn t ca cc nguyn t khc nhau phi khng ging nhau v s hiu nguyn t (Z) ms hiu nguyn t (Z) = s proton (P) = s electron (E)

Nhng do hin tng ng v, cc nguyn t ca cng mt nguyn t ha hc c th khcnhau v s notron (s khi), do nguyn t ca cc nguyn t khc nhau c th c s notron gingnhau

VD:14

6 C (6 proton, 8 notron) v16

8C ( 8 proton, 8 notron)p n ng l BCu 2. X3+: 1s22s22p63s23p63d5 [Ar]3d5

X: 1s22s22p63s23p63d64s2 [Ar]3d64s2p n ng l A

*Ch : Nguyn t kim loi nhng cc electron ha tr trc tin lp ngoi cng, sau mi ncc electron ha tr phn lp st lp ngoi cng (nguyn t d, f, phn lp ny c s electron cha

bo ha)Cu 3. Cc cht c cu trc tinh th nguyn t (kim cng) tinh th ion (mui n NaCl), tinh thkim loi (nhm), chng khng tn ti phn t ring l, m tinh th l mt phn t khng l

p n ng l A

Cu 4. Xt cc phng n:A. +12n+2C H CnH2n + H2

o Phn ng oxi ha khB. Na + ROH+1 RONa + 1/2H2

o Phn ng oxi ha khC. CO2 + H2O + C6H5ONa C6H5OH + NaHCO3 Khng phi phn ng oxi ha kh

-1 -1 -2 0

D. 2CH=CH CH2=CH-C CH Phn ng oxi ha khp n ng l C

Cu 5. V nFeO =2 3Fe O

n , do c th coi hn hp ch c Fe3O4 (FeO.Fe2O3)

3 4Fe O

2,32n = = 0,01 (mol)

232

PTHH: Fe3O4 + 8HCl FeCl2 + 2FeCl3 + 4H2O0,01 0,08 (mol)

Suy ra: VddHCl =0,08

= 0,081

(lt)

p n ng l A*Ch :

- Fe3O4 (oxit st t) coi l hn hp FeO, Fe2O3 (s mol FeO bng s mol Fe2O3)- Fe3O4 + HCl thc t l: FeO.Fe2O3 + 8HCl FeCl2 + 2FeCl3 + 4H2O

Cu 6. Theo bi ra:2O

48n = = 1,5 (mol)

32

Xt cc phng n:A. 2KMnO4 ot K2MnO4 + MnO2 + O2

mol 1 0,5 loi

B. 2NaNO3 ot 2NaNO2 + O2 mol 1 0,5

loi

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C. 2HgOot 2Hg + O2

mol 1 0,5 loi

D. 2KClO3ot cao 2KCl + 3O2

mol 1 1,5

tha mn yu cu bi tonp n ng l DCu 7. Khi tng nng , p sut, nhit , din tch b mt cht phn ng tn s va chm (sln va chm trong mt n v thi gian) gia cc cht phn ng tng tc phn ng tng. pn ng l ACu 8. Th nghim 1. nCu = 0,06 (mol);

3HNOn = 0,08 (mol)

3 Cu + 8HNO3 3Cu(NO3)2 + 2NO + 4H2Omol 0,06 0,08

Cu d, HNO3 ht V1 = 0,02.V (lt)Th nghim 2: nCu = 0,06 (mol), +Hn = 0,16 mol ; -3NOn = 0,08 mol

3Cu + 8H+

+ 2NO3-

3Cu2+

+ 2NO + 4H2Omol 0,06 0,16 0,08 Cu ht V2 = 0,04.V (lt)

*Ch : V2 = 2V1. p n ng l BCh : S dng phng trnh ion rt gn giiCu 9. PTP: Cu + 4HNO3 (c) Cu(NO3)2 + 2NO2 + 2H2O

tng h s cc cht trong PTHH l 1 + 4 + 1 + 2 + 2 = 10p n ng l B

Cu 10. Xt cc dung dch:* Dung dch Na2CO3: Na2CO3 2Na

+ + CO32

CO32 + H2O HCO3

+ OH

HCO3 + H2O H2CO3 + OH

* Dung dch NH4HCO3: NH4HCO3 NH4

+ + HCO3

NH4+ H

+ + NH3

HCO3 H

+ + CO32

HCO3 + H2O H2CO3 + OH

* Dung dch (NH4)2CO3: (NH4)2CO3 2NH4+ + CO3

2

NH4+ H

+ + NH3

CO32 + H2O HCO3

+ OH

Vy dung dch c pH thp nht ( axit ln nht) l NH4HCO3 ri n (NH4)2CO3 v cuicng l Na2CO3.p n ng l B

*Ch : Gi tr pH cng nh th axit ca mi trng cng ln v pH cng ln th axit ca mitrng cng nh, kim ca mi trng cng lnCu 11. Xt cc phng n:

A. CH3COONa (3) CH4 (4) C2H6 (1) C2H4Br2 (2) CH3CHO (5)Loi, v CH4 khng th chuyn thnh C2H6 bng 1 phn ng ha hcB. CH4 (4) C2H6 (1) C2H4Br2 (2) CH3COONa (3) CH3CHO (5)Loi, v l do nh A

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C. C2H4Br2 (2) C2H6 (1) CH3CHO (5) CH3COONa (3) CH4 (4)Loi, v C2H6 khng th chuyn thnh CH3CHO bng 1 phn ng ha hcD. C2H6 (1) C2H4Br2 (2) CH3CHO (5) CH3COONa (3) CH4 (4)Tha mn v:C2H6 + 2Br2

as CH3CHBr2 + 2HBr

CH3CHBr

2+ 2NaOH

ot [CH3CH(OH)

2] + 2NaBr

CH3CHO + H2OCH3CHO + 2Cu(OH)2 + NaOH

ot CH3COONa + Cu2O + 3H2O

CH3COONa + NaOH oCaO, t CH4 + Na2CO3

p n ng l DCu 12. Gi dn xut monobrom l RBr

MRBr= 75,5.2 = 151 R + 80 = 151 R = 71 (C5H11

) CTPT ca ankan l C5H12V khi brom ha ch thu c mt dn xut monobrom duy nht nn ankan ny phi c cu

to:

CH3CH3-C-CH3 2,2 - imetylpropanCH3 (neopentan)

Tht vy:CH3 CH3

CH3-C-CH3 + Br2as CH3-C-CH2Br + HBr

CH3 CH3p n ng l B

Cu 13. Cc phn ng ny u l phn ng oxi ha kh (4 phn ng)p n ng l D

Cu 14. p n ng l A

Cu 15. Hp cht xeton mch h, n chc c cu to dng R1-CO-R2 (R1, R2 l cc gchirocacbon)

+Vn = (2.5 + 2 - 10)/2 = 1 ( C=O)

Xeton no, h, n chcCc ng phn xeton l:

CH3-CO-CH2CH2CH3; CH3COCH(CH3)2CH3CH2COCH2CH3 (3 ng phn)p n ng l C

Cu 16. Este l CH3COO-CH=CH2

CH3COO-CH=CH2 + H2O+H CH3COOH + CH3CHO

Axetanehitp n ng l CCu 17. p n ng l BCu 18. p n ng l CCu 19. Cc trng hp xut hin n mn in ha khi tha mn 3 iu kin n mn in ha

- Th nghim 1: Ch c 1 in cc (cc Fe)- Th nghim 2: Fe + CuSO4 Cu + FeSO4Tha mn 3 iu kin: C 2 in cc khc nhau (cc Fe, cc Cu) hai cc ni trc tip vinhau, hai in cc c nhng vo mt dung dch cht in li l dung dch CuSO4- Th nghim 3: Ch c mt in cc (cc Cu)

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- Th nghim 4: Tha mn 3 iu kin n mn in haVy c hai trng hp tha mn xut hin n mn in ha (TN2 v TN4)p n ng l B

Cu 20. PTHH: Al + 4HNO3 Al(NO3)3 + NO + 2H2O(Al + 4H+ + NO3

- Al3+ + NO + 2H2O) S phn t HNO3 b kh v s phn t HNO3 to mui nitrat l 1 : 3p n ng l A

Cu 21. Gang l hp kim ca st vi cacbon (t 2 5% theo khi lng) v mt s nguyn t gang(Mn, Si,)Thp l hp kim ca st vi cacbon ( 2% theo khi lng) v mt s rt t cc nguyn t khcDo nguyn tc luyn gang thnh thp l:

Dng O2 oxi ha cc tp cht Si, P, S, Mn trong gang thu c thp:Si + O2 SiO24P + 5O2 2P2O5S + O2 SO22Mn + O2 2MnO

p n ng l ACu 22. Xt cc PTHH xy ra khi nung trong khng kh

- 4Fe(OH)2 + O2 ot 2Fe2O3 + 4H2O (phn ng oxi ha kh)- Cu(OH)2 ot CuO + H2O- Ni(OH)2 ot NiO + H2O- Zn(OH)2 ot ZnO + H2O- 4Cr(OH)2 + O2 ot 2Cr2O3 + 4H2O (phn ng oxi ha kh) c 2 cht khi nung trong khng kh xy ra phn ng oxi ha khp n ng l B

Cu 23. Tc nhn ch yu gy ma axit l SO2 v NO2:SO2 + NO2 SO3 + NO

SO3 + H2O H2SO42NO + O2 2NO24NO2 + O2 + 2H2O 4HNO3

H2SO4, HNO3 ha tan vo nc ma, to ra ma axitp n ng l B

Cu 24. V Epin lun dng loi phng n A v D- V Cr c tnh kh mnh hn Sn nn:

2+ 3+ 2+ 2+

o o o o o

(Cr - Sn) Sn /Sn Cr /Cr Sn /Sn Sn /SnE = E - E = E -(-0,74) = E + 0,74 (V)

- V Sn ng trc H trong dy in ha nn 2+oSn /SnE < 0Do o

(Cr - Sn)E < 0,74V. p n ng l C

Cu 25. Gi R, r ln lt l bn knh ca nguyn t, ht nhn (cng n v). Ta c: Tit din trn(S) ca nguyn t: Snguyn t = R

2Tit din trn (S) ca ht nhn: Sht nhn = r

2

Ta c:8

S 10=

S' 1

28

2

R= 10

r R2/r2 = 108 R/r = 8 410 = 10

Vy ng knh (hoc bn knh) ca nguyn t ln hn ng knh ca ht nhn khong 10 4ln (1 vn ln). p n ng l CCu 26. p n ng l D

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*Ch : Cc i lng, tnh cht ca nguyn t cc nguyn t bin thin theo chiu tng ca intch ht nhn l

- Cu hnh electron lp ngoi cng ca nguyn t- S electron lp ngoi cng- Bn knh nguyn t, m in, nng lng ion ha th nht; tnh kim loi; tnh phi kim;

ha tr cao nht vi oxi (oxit cao nht); ha tr trong hp cht kh vi hiro ca phi kim,tnh axit, tnh baz ca oxit cao nht v hiroxit tng ng

Cu 27. Cng thc phn t ca cc n cht :A. Ozon (O3): B. Heli (He)C. Brom (Br2) E. Photpho trng (P4)D. kim cng (Cn, n v cng ln) F. lu hunh n t (S8)p n ng l D

Cu 28. Hon thnh PTHH:FeO + 4HNO3 (c, nng) Fe(NO3) + NO2 + 2H2O

Tng h s ca cc cht tham gia phn ng 1 + 4 = 5p n ng l C

Cu 29. PTHH:CH2Cl-CH-CH2-CH3

CH3-CH-CH2-CH3 + Cl2 as, 1 : 1 CH3-CCl-CH2-CH3 + HClCH3 CH3

CH3-CH-CHCl-CH3CH3

CH3-CH-CH2-CH2ClCH3

Vy thu c 4 sn phm monoclop n ng l C

Cu 30. Hon thnh phng trnh phn ng:

+7 -1 +2 0KMnO4 + H2SO4 + H2O2 MnSO4 + K2SO4 + O2 + H2O

+7 +2

2x Mn + 5e Mn-1 0

5x 2O - 2.1e 2O2KMnO4 + 3H2SO4 + 5H2O 2MnSO4 + K2SO4 + 5O2 + 8H2O

Tng h s ca cc cht tham gia phn ng bng 2 + 3 + 5 = 10p n ng l DCu 31. Hng s cn bng KC ph thuc vo bn cht v nhit

i vi mt cn bng ha hc xc nh th hng s cn bng ca n ch ph thuc vo nhit. p n ng l A*Ch : Gi tr hng s cn bng KC ca mt cn bng ha hc khng ph thuc vo nng (C),p sut (P) v cht xc tcCu 32.

2

-3

NOn = 22,4.10 /22,4 = 0,001 mol

Phng trnh ion rt gn ca phn ng:Ag + 2H+ + NO3

- Ag+ + NO2 + H2O0,002 mol 0,001 mol 0,001 mol

* Gi s NO3- phn ng ht:

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-2 33

NO HNONOn = n = n = 0,001 (mol)

V nHCl :3HNO

n :2 4H SO

n = 1 : 5 : 1

nHCl = 0,0002 (mol);2 4H SO

n = 0,0002 (mol)

+3 2 4HCl HNO H SOH

n = n + n + 2n

= 0,0002 + 0,0001 + 2.0,0002 = 0,0016 (mol)Theo PTHH: +

H

n (p) = 2.3NO

n = 2.0,001 = 0,002 (mol)

Nhng +Hn (ban u) = 0,0016 < 0,002 (do , gi thit-

3NO phn ng ht l sai). Vy H+ phn

ng ht ( -3

NO d)

+H

n = 0,002 (mol) [H+] = 0,002/0,2 = 0,01 (mol) pH = 2

p n ng l C*Ch : + S dng phng trnh ion rt gn (V H+ do nhiu axit cung cp)

+ Cn chng minh H+ phn ng ht (da vo NO2 chng minh-

3NO d

H+ phn ng ht)Cu 33. Xt cc phn ng:

a) FeO + 4HNO3 (c) Fe(NO3)3 + NO2 + 2H2O Phn ng oxi ha kh

b) 2FeS + 2H2SO4 (c) Fe2(SO4)3 + SO2 + 2H2O phn ng oxi ha khc) Al2O3 + 6HNO3 (c) 2Al(NO3)3 + 3H2O khng phi phn ng oxi ha khd) Cu + 2FeCl3 (dd) 2FeCl2 + CuCl2 phn ng oxi ha khe) CH3CHO + H2 oNi, t CH3CH2OH phn ng oxi ha khf) CH2(OH)(CHOH)4CHO + Ag2O 3NH CH2(OH)(CHOH)4COOH + 2Ag phn ng oxi ha khg) C2H4 + Br2 CH2Br-CH2Br phn ng oxi ha khh) 2C3H5(OH)3 + Cu(OH)2 [C3H5(OH)2O]2Cu + 2H2O khng phi phn ng oxi ha khVy cc phn ng a, b, d, e, f, g l phn ng oxi ha khp n ng l D

Cu 34. Theo bi ra: nCO =4,48

= 0,2 (mol)22,4

t CTHH ca oxit st l FeXOY

PTHH: FeXOY + yCOo

t xFe + yCO2

Theo PTHH: nCO =2CO

n

nhh kh sau p/ = nCO(ban u) = 0,2 mol m hh kh (sau) = 0,2.20.2 = 8 (g)

Theo nh lut bo ton khi lng:

X YFe O kh (trc) Fe kh (sau)m + m = m + m =

x yFe Fe O kh (trc) kh (sau)m = m + m - m = 8 + 0,2.28 8 = 5,6 (gam)

Do , ta c: x : y =5,6 8 - 5,6

: = 0,1 : 0,15 = 2 : 356 16

Oxit st l Fe2O3

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Gi a, b ln lt l s mol CO, CO2 trong hn hp sau phn ng. Ta c:a + b = 0,2 a = 0,05

28.a + 44.b = 8 b = 0,15

Do : %2CO

0,15.100V = = 75%

0,2. p n ng l C

Cu 35. Nhn xt:

-

Cht hu c n chc X + dung dch HCl (HCl, H2O) cht hu cY (C, H, O) + Cht hu c Z (C, H, O). Suy ra+ X + H2O

HCl (xt) Y + Z (v Y, Z khng c clo)+ X l este (b thy phn, n chc)+ S mol: nY = nZ (v X n chc)+ Phn t khi MY = MZ (v cng khi lng, cng s mol)+ Z l ancol hoc axit cacboxylic n chc (v sn phm ca phn ng thy phn este n

chc)- Gi s t chy Z (CXHYOZ) thu c 88 gam CO2 (2 mol)

2H O= 45 gam

2H On = 2,5 (mol)

Z dng (C2H5)nOz , tha mn khi Z l ancol, n = 2, z = 1Vy Z l C4H10O (M = 74)Suy ra: MY = 74, Y l axit cacboxylic n chc dng RCOOH R = 74 45 = 29 (C2H5)Vy Y l C2H5COOH; Y l C7H14O2p n ng l D

Cu 36. S chuyn ha:2CH4 CH CH CH2=CHCl -(CH2-CHCl-)n2.16 (kg) 62,5 kgx ? 250 kg

250.2.16

x = = 128 (kg)

62,5

V H = 50% nn khi lng CH4 thc t cn dng l

4CHm (thc t) =

128.100= 256 (kg)

50

4CH

V (ktc) = 3256.1000.22,4

= 358,4 (m )16.1000

V CH4 ch chim 80% th tch kh thin nhin nn:

V(kh thin nhin) = 4CH

V .100= 448,0

80(m3)

p n ng l D

Cu 37. Theo bi ra: 2CO13,2

n = = 0,3 (mol)44 ; 2H O3,6

n = = 0,2 (mol)18 n(hh ankin) =

2COn -

2H On = 0,3 0,2 = 0,1 (mol)

PTHH vi Br2: CnH2n-2 + 2Br2 CnH2n-2Br4mol 0,1 0,2

Suy ra2Br= 0,2.160 = 32 (gam) . p n ng l D

Ch : Khi t chy ankin th2CO

n >2H O

n v nankin =2CO

n -2H O

n

Cu 38. p n ng l CCu 39. Ancol cn tm dng ROH

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Hirocacbon khng no + H2O

ROH 2 4H SO d (X)

Ete + H2O(Y)

V dX/Y = 1,6428 > 1 Y phi l hirocacbon khng no. Ta c:

dX/Y = XY

M R + 17= = 1,6428

M R - 1 R + 17 = 1,6428.R 1,6428

0,6428.R = 18,6428 R = 29 (C2H5)

Vy X l C2H5OH (C2H6O). p n ng l B*Ch : ROH (X) 2 4H SO d Y(cht hu c)

Nu d X (h)/Y (h) =R + 17

< 12.R + 16

Y l este

Nu d X (h)/Y (h) =R + 17

< 1R - 1

Y l hirocacbon khng no

Cu 40. PTHH: CH3COOH + C

2H

5OH

CH

3COOC

2H

5+ H

2O

Ban u: mol 1 1Phn ng: mol 2/3 2/3 2/3 2/3Cn bng: mol 1/3 1/3 2/3 2/3

Hng s cn bng ca phn ng:

KC =

3 2 5 2

3 2 5

CH COOC H . H O 2/3.2/3= = 4

CH COOH C H OH 1/3.1/3

CH3COOH + C2H5OH CH3COOC2H5 + H2OBan u: mol 1 x 0,9 0,9Phn ng:mol 0,9 0,9 0,9 0,9

Cn bng:mol 0,1 (x 0,9) 0,9 0,9V T = const nn KC = 4 (khng thay i)

KC =0,9.0,9

= 40,1.(x - 0,9)

0,81 = 0,4.x 0,36

0,4.x = 1,17 x = 2,925p n ng l DCu 41. p n ng l DCu 42. p n ng l BCu 43. V o

(Cu-X)E = 0,46 V 2+ X+o o

Cu /Cu X /XE < E

Tnh kh X < Cu (1)

V

o

(Y - Cu)E = 1,1V

2+ Y+

o o

Cu /Cu Y /YE < E Tnh kh Cu < Y (2)V o

(Z - Cu)E = 0,47V 2+ Z+o o

Cu / Cu /ZE < E

Z

Tnh kh Cu < Z (3)V o

(Y - Cu)E >o

(Z - Cu)E 2+ Y+o o

Cu /Cu Y /YE - E > 2+ Z+o o

Cu /Cu /ZE - E

Z

Y+o

Y /YE < Z+

o

/ZE

Z Tnh kh Y > Z (4)

T (1, 2, 3, 4) ta c: X < Cu < Z < Y . p n ng l BCu 44. Thuc th l Na2CO3. Tht vy:

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Na2CO3 + NaCl khng phn ngNa2CO3 + CaCl2 CaCO3 + 2NaCl3Na2CO3 + 2AlCl3 + 3H2O 2Al(OH)3 + 3CO2 + 6NaCl

p n ng l ACu 45. Dung dch FeCl3 phn ng vi CH3NH2 (metyl amin) to ra kt ta

Fe(OH)3: FeCl3 + 3CH3NH2 + 3H2O Fe(OH)3 + 3CH3NH3Clp n ng l A

*Ch : Cc ankyl amin bc I (RNH2, R l gc ankyl) c tnh baz mnh hn amoniac (NH3):RNH2 + HOH RNH3

+ + OH-

NH3 + HOH NH4+ + OH-

Cu 46. Cc cht kh c mi l1. SO2 (kh sunfur) Mi hc2. NO2 (nit ioxit) Mi kh chu v c3. O3 (ozon): Mi kht c trng4. Cl2 (clo) Mi xc, c5. NH3 (amoniac) Mi khai6. H2S (hiro sunfua) Mi trng thi

c 6 cht kh c mip n ng l A

Cu 47. Cc PTHH xy ra trong s trn

2CuFeS2 + O2ot Cu2S + 2FeS + SO2

(X)

2Cu2S + 3O2ot 2Cu2O + 2SO2

(Y)2Cu2O + Cu2S

ot 6Cu + SO2

Vy X, Y ln lt l Cu2S, Cu2O. p n ng l BCu 48. Trong pin in ha, s oxi ha ch xy ra cc m (anot)p n ng l A

Cu 49. Cc loi thy tinh:- Thy tinh loi thng thng

6SiO2 + CaCO3 + Na2CO3o1400 C Na2O.CaO.6SiO2.2CO2

- Thy tinh kali: Thay Na2CO3 bng K2CO3- Thy tinh pha l: Thy tinh cha nhiu ch oxit- Thy tinh thch anh: SiO2 tinh khit- Thy tinh hu c: Poli (metyl metacrylat) Thy tinh hu c (Plexiglas) c thnh phn ha hc khc hn vi cc loi thy tinh (v c)

cn li. p n ng l CCu 50. Theo bi ra:

2H

1,344n = = 0,06 (mol)

22,4

Ta thy2 4H SO

n (p/) =2H

n = 0,06 (mol)

S phn ng: Kim loi + axit mui + hiroTheo nh lut bo ton khi lng:mkim loi + maxit = mcht rn + mhiro 2,49 + 0,06.98 = m + 0,06.2 m = 8,25 (gam). p n ng l B

Cu 51. 5Na2SO3 + 2KMnO4 + 6NaHSO4 8Na2SO4 + 2MnSO4 + K2SO4 + 3H2O

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Tng h s ca cc cht l 27 p n ng l BCu 52. Mhh.A = 0,1.70 + 0,3.2 = 7,6 gam

2hhB Hhh

7,6n = = 0,24 (mol) n n = 0,1 + 0,3 - 0,24 = 0,16 (mol)

95.4

12

Hphn ng = 0,16 : 0,1.2 = 80% p n ng l DCu 53. nO phn ng =

5,6 - 4) : 26 = 0,1 mol < nancol b Mancol < 4 : 0,1 = 40 ancol: CH3OH

H = 0,1 : 0,125 = 80% p n ng l CCu 54. Phn ng cc m c s tham gia ca kim loi hoc ion kim loi p n ng l A

Cu 55. +33 4Cu Fe OFe

1n = n = n

2. Gi s hn hp X 1 mol

3 4Cu Fe On = n = 0,5 mol

2 2HCl CuCl FeCln = 2n + 2n = 2.0,5+2.0,5.3 = 4 (mol)

ddY

4 . 36,5m = 0,5 . 64 + 0,5 . 232 + . 100 = 878 (gam)

20

2C%FeCl = [(0,5 . 3 . 127) : 878] . 100% = 21,697% p n ng l ACu 56. Mgo Mg+2 + 2e; Fe+3 + e Fe+2

0,12 0,24 0,06 0,06 m = 0,12 . 24 = 2,88 gam; Fe+3 + 3e Fe p n ng l ACu 57. p n C. Tc nhn ch yu gy ma axit l SO2, NO2Cu 58. ROH + HBr 2 4H SORBr + H2O

%mBr= RR

80 . 100= 69,56 (I) M = 35 gam

M + 80

NBr= 2, nh vy gc R c mt ni i

%mBr= R 5 9R

80 . 2 . 100= 69,56(II) M = 69 C H OH

M + 80 + 81

Cu 59. Nhng cht tham gia phn ng trng gng l: HCHO, HCOOH, CH3CHO, C12H22O11(mantoz) p n ng l ACu 60. Nhng cht lm qu ha hng: axit glutamic

Nhng cht lm qu ha xanh: lysine, trimetylaminNhng cht khng lm i mu qu: valin, alanin, anilin