On Tap Cac Đề Thi Cuoi Ki Hdc a 2015

5: thi c 50 cu. Thi gian lm bi thi: 65 pht

Th sinh ch c chn 1 trong 4 p n, trong trng hp c nhiu p n ph hp vi yu cu th ch chn p n ng v y nht. Th sinh khng c s dng ti liu k c bng h thng tun hon.Cu 1: Chn phng n ng: Tnh G0298 ca phn ng:CH4(k) + 2O2(k) = 2H2O(l) + CO2(k)Cho bit th ng p to thnh tiu chun ca CH4(k); H2O(l) v CO2(k) 250C c gi tr ln lt l: 50.7; 237; 394.4 kJ/mol

1. +817.7 kJ1. 817.7 kJ1. 645 kJ1. +645kJ.

Cu 2: Chn phng n ng:Khi ghp mt tm bc trong dung dch bo ha AgBr v mt tm bc khc trong dung dch AgNO3 0,01M ta c pin nng c sut in ng 250C l 0.245V. Hy tnh tch s tan ca AgBr 250C.

1. 2 10-121. 2 1041. 5 10-131. Khng d liu tnh

Cu 3: Chn trng hp ng:

Tnh th kh chun 250C trong mi trng acid. Cho bit th kh chun 250C trong mi trng acid: = 0.353V v = 0.771V

1. 1.33V1. 0.667V1. 0.980V1. 0.627V

Cu 4: Tnh hng s cn bng ca phn ng 250C:

(dd) + (dd) + H2O() NH4OH(dd) + HNO2(dd)Cho bit 250C: H2O() H+(dd) + OH-(dd); Kn = 10-14

NH4OH() (dd) + OH-(dd);

HNO2(dd) H+(dd) + NO2-(dd);

1. 10-5.91. 10-6.11. 10-7.31. 10-6.8

Cu 5: Chn pht biu ng trong cc pht biu sau:1. tan ca cht kh trong nc cng tng khi nhit dung dch cng tng. Bit qu trnh ha tan ca cht kh trong nc c Hht < 0.1. tan ca cht t tan khng ph thuc vo bn cht dung mi.1. tan cht rn t tan s tng khi cho vo dung dch ion cng loi vi mt trong cc ion ca cht t tan .1. nhit khng i, tan ca cht kh t l thun vi p sut ring phn ca n.Cu 6: Chn trng hp ng: Cho bit tch s tan ca AgI 250C l 1016.1) tan ca AgI trong nc nguyn cht l 108 mol/l.2) tan ca AgI trong dung dch KI 0.1M gim i 107 ln so vi trong nc nguyn cht.3) tan ca AgI trong nc s nh hn trong dung dch NaCl 0.1M.4) tan ca AgI trong nc ph thuc vo nhit .

1. Tt c cng ng1. Ch 1,2 ng1. Ch 3,4 ng1. Ch 1,2,3 ng

Cu 7: Chn pht biu sai: 1. gim p sut hi bo ha ca dung dch t l thun vi nng mol ring phn ca cht tan.1. Nhit ng c ca dung mi nguyn cht lun cao hn nhit ng c ca dung mi trong dung dch.1. cng iu kin p sut ngoi, nhit si ca dung dch cha cht tan khng bay hi lun lun cao hn nhit si ca dung mi nguyn cht.1. cng nhit T, p sut hi bo ha ca dung mi trong dung dch lun lun ln hn p sut hi bo ha ca dung mi nguyn cht.Cu 8: Chn phng n ng: Mt phn ng iu kin ang xt c G > 0 th:1. C kh nng t pht theo chiu thun ti iu kin ang xt.1. trng thi cn bng.1. C kh nng t pht theo chiu nghch ti iu kin ang xt.1. Khng th d on kh nng t pht ca phn ngCu 9: Chn phng n ng:

Cho v . Tnh hng s cn bng 25oC ca phn ng: 2Fe3+(dd) + Sn2+(dd) 2Fe2+(dd) + Sn4+(dd)

1. 10141. 10181. 10211. 1027

Cu 10: Chn phng n ng:Ha tan 1mol mi cht C6H12O6, C12H22O11 v C3H5(OH)3 trong 1000 gam nc. cng p sut ngoi, theo trt t trn nhit si ca dung dch:

1. Tng dn1. Bng nhau1. Gim dn1. Khng so snh c.

Cu 11: Chn cu ng. Cho cc dung dch nc long ca C6H12O6, NaCl, MgCl2, Na3PO4. Bit chng c cng nng molan v in ly ca cc mui NaCl, MgCl2 v Na3PO4 u bng 1. cng iu kin p sut ngoi, nhit ng c ca cc dung dch theo dy trn c c im:

1. Tng dn1. Khng c quy lut1. Bng nhau1. Gim dn

Cu 12: Chn phng n ng: Tch s tan ca Cu(OH)2 bng 2 10-20. Thm dn NaOH vo dung dch mui Cu(NO3)2 0.02M cho ti khi kt ta Cu(OH)2 xut hin. Vy, gi tr pH m khi vt qu n th kt ta bt u xut hin l:

1. 91. 51. 61. 4

Cu 13: Chn pht biu sai. 1. in ly ca cht in ly yu lun nh hn 11. in ly ph thuc vo bn cht cht in ly, bn cht dung mi v nhit .1. in ly ca cht in ly tng ln khi nng cht in ly gim.1. in ly ca cht in ly mnh lun bng 1 mi nng .Cu 14: Chn pht biu ng:1) khng tuyt i (0 K), bin thin entropi trong cc qu trnh bin i cc cht trng thi tinh th hon chnh u bng khng.2) Trong h h tt c cc qu trnh t xy ra l nhng qu trnh c km theo s tng entropi.3) Trong qu trnh ng p v ng nhit qu trnh t xy ra gn lin vi s tng th ng p ca h.

1. 1,31. 31. 11. 2

Cu 15: Chn phng n ng: Phn ng Zn(r) + 2HCl(dd) ZnCl2(dd) + H2(k) l phn ng ta nhit mnh. Xt du o, So, Go ca phn ng ny 25oC:

1. Ho < 0; So > 0 ; Go > 01. Ho < 0; So > 0 ; Go < 01. Ho < 0; So < 0 ; Go < 01. Ho > 0; So > 0 ; Go < 0

Cu 16: Chn phng n ng: T hai phn ng (1)A + B = C + D;G1 (2)2E + 2F = C + D;G2Thit lp c cng thc tnh G3 ca phn ng: A + B = E + F

1. G3 = G1 - G2 1. G3 = G2 + G1 1. G3 = G1 G21. G3 = -G1 G2

Cu 17: Chn phng n ng:Hng s in ly ca acid HA l Ka = 105 250C. Tnh in li ca dung dch acid HA 0.1M.

1. 0.10 1. 0.0011. 0.011. 0.0001

Cu 18: Chn p n ng:Cho dung dch base hu c n chc 0.1M c pH = 11. Tnh phn li ca base ny:

1. 1%1. 0.5%1. 5%1. 0.1%

Cu 19: Chn phng n ng:Dung dch cht in ly AB2 c h s ng trng i = 1.84, vy in ly ca cht ny trong dung dch l:

1. 0.441. 0.841. 0.281. 0.42

Cu 20: Chn phng n ng: 1) Mt cht lng si mt nhit ti p sut hi bo ha ca cht lng bng p sut mi trng.2) p sut ngoi khng i, nhit si v nhit ng c ca dung dch lng long cha cht tan khng in li, khng bay hi l khng i trong sut qu trnh chuyn pha.3) p sut ngoi khng i, nhit si v nhit ng c ca cht lng nguyn cht l khng i trong sut qu trnh chuyn pha.4) C th gim nhit si ca cht lng bng cc tng p sut ngoi. 5) Cht lng c p sut hi bo ha cng nh th kh nng bay hi cng cao.

1. Ch 2,4,5 ng1. Ch 1,3 ng1. Ch1, 2,31. Tt c cng ng

Cu 21: Chn phng n ng: Bit rng nhit to thnh tiu chun ca B2O3 (r), H2O (), CH4 (k) v C2H2 (k) ln lt bng: -1273.5; -285.8; -74.7 ; +2.28 (kJ/mol). Trong 4 cht ny, cht kh b phn hy thnh n cht nht l:

1. C2H21. CH41. B2O31. H2O

Cu 22: Chn phng n ng:1. H on nhit l h khng trao i cht v cng, song c th trao i nhit vi mi trng.1. H kn l h khng trao i cht v nhit, song c th trao i cng vi mi trng.1. H kn l h khng trao i cht v cng, song c th trao i nhit vi mi trng.1. H on nhit l h khng trao i cht v nhit, song c th trao i cng vi mi trng.Cu 23: Chn phng n ng: Cho phn ng: SO2 (k) + O2 (k) = SO3 (k)

Tnh So (J/K) 25oC ng vi 1 gam SO2 tham gia phn ng vi lng oxy va . Cho bit entropi tiu chun 25oC ca cc cht SO2(k), O2(k) v SO3(k) ln lt bng: 248, 205 v 257 (J/mol.K) (= 64g/mol)

1. 1.461. 93.51. 93.51. 1.46

Cu 24: Chn phng n ng:Tnh nhit to thnh tiu chun ca Br -.aq (1) v ca Na+.aq (2) trong dung mi nc 250C. Cho bit:

H2(k) + Br2(l) + aq = 2H+.aq + 2Br .aq; = -241.8 kJ

Quy c: kJ

2Na(r) + Br2 (l) + aq = 2Na+.aq + 2Br -.aq; = -722.4 kJ1. (1) = -241.8 kJ/mol ; (2) = -480.6 kJ/mol1. (1) = -120.9 kJ/mol ; (2) = -240.3 kJ/mol1. (1) = -120.9 kJ/mol ; (2) = -480.6 kJ/mol1. (1) = -241.8 kJ/mol ; (2) = -240.3 kJ/molCu 25: Chn phng n sai:1. Trng thi cn bng l trng thi c thay i th ng p ng nhit bng khng.1. trng thi cn bng phn ng ha hc khng xy ra theo c chiu thun ln chiu nghch.1. Trng thi cn bng l trng thi c tc phn ng thun bng tc phn ng nghch v t l khi lng gia cc cht phn ng v sn phm phn ng l khng i nhng iu kin bn ngoi xc nh.1. Trng thi cn bng khng thay i theo thi gian nu khng c iu kin bn ngoi no thay i.Cu 26: Chn phng n ng: Cho phn ng oxy ha kh: HI + H2SO4 = I2 + S + H2OCn bng phn ng trn. Nu h s trc H2SO4 l 1 th h s ng trc HI v I2 ln lt l:

1. 8 v 41. 2 v 11. 6 v 31. 4 v 2

Cu 27: Chn phng n ng: Cho cc s liu sau:1) o (Ca2+/Ca) = - 2.79 V 2) o (Zn2+/Zn) = - 0.764 V3) o (Fe2+/Fe) = - 0.437 V4) o (Fe3+/Fe2+) = + 0.771 VCc cht c sp xp theo th t tnh oxy ha tng dn nh sau:

1. Fe3+ < Fe2+ < Zn2+ < Ca2+1. Ca2+ < Zn2+ < Fe2+ < Fe3+1. Ca2+ < Zn2+ < Fe3+ < Fe2+1. Zn2+ < Fe3+ < Ca2+ < Fe2+

Cu 28: Chn phng n ng: Cc thng s u c thuc tnh cng l:

1. Th ng p, entanpi, th tch1. Th kh, nhit , khi lng ring1. Entropi, khi lng, s mol1. Th ng p, nhit , ni nng

Cu 29Etylen glycol (EG) l cht chng ng trong b tn nhit ca ng c t hot ng vng bc v nam cc tri t. Tnh th tch EG cn thm vo b tn nhit c 8 nc c th lm vic nhit thp nht l -200C. Cho bit khi lng ring ca EG l 1.11g/cm3. Hng s nghim ng ca nc bng 1.86 /mol. Cho phn t lng ca EG l 62.

1. 4.8 1. 5.1 1. 4.2 1. 5.6

Cu 30: Chn phng n ng:

Bit = + 0.54 V v = +0.77 V. Trong cc phn ng sau, phn ng no xy ra iu kin tiu chun?1. 2Fe2+(dd) + I2(r) 2Fe3+(dd) + 2I-(dd)1. 2Fe3+(dd) + I2(r) 2Fe2+(dd) + 2I-(dd)1. 2Fe3+(dd) + 2I-(dd) 2Fe2+(dd) + I2(r)1. Fe2+(dd) + I-(dd) Fe3+(dd) + I2(r)Cu 31: Chn phng n ng: Phn ng ca kh NO2 vi nc to thnh acid nitric gp phn to ma acid: 3NO2(k) + H2O(l) 2HNO3(dd) + NO(k)

33.2 -285.83 -207.4 90.25(kJ/mol)

240.0 69.91146210.65 (J/mol.K)

Tnh ca phn ng. Nhn xt v kh nng t pht ca phn ng iu kin tiu chun, 250C.1. 62.05 kJ. Phn ng khng c kh nng din ra t pht.1. -41.82 kJ. Phn ng c kh nng xy ra t pht.1. 26.34 kJ. Phn ng khng c kh nng din ra t pht.1. -52.72 kJ. Phn ng c kh nng xy ra t pht.Cu 32: Chn phng n ng: Tnh hng s cn bng Kp 250C ca phn ng sau:

N2(k) + 3/2H2(k) NH3(k) ; ()p = 16kJ, Cho bit R = 8.314J/mol.K

1. 106.5 1. 103.5 1. 101.7 1. 102.8

Cu 33: Chn phng n ng: Xc nh nhit to thnh tiu chun 250C ca CuO(r), cho bit:

2Cu(r) + O2(k) 2CuO(r); = 310.4 kJ

Cu(k) + O2(k) CuO(r); = 496.3 kJ

Cu2O(r) + O2(k) 2 CuO(r); = 143.7 kJ

1. 310.4 kJ/mol1. 155.2 kJ/mol1. 143.7 kJ/mol1. 496.3 kJ/mol

Cu 34: Chn phng n ng: Cho pin nng 250C:(1) Ag Ag+(dd) 0.001M Ag+(dd) 0.100M Ag (2)1) in cc (1) l anod2) in cc (2) l catod3) mch ngoi electron di chuyn t in cc (2) qua (1)4) Ti in cc (1) xut hin kt ta Ag5) Ti in cc (2) Ag b tan ra6) Sc in ng ca pin 250C l 0.059V7) Khi pin ngng hot ng khi nng Ag+ trong dung dch hai in cc l 0.0505M

1. 3,4,51. 1,2,61. 4,6,71. 1,2,7

Cu 35: Chn phng n ng:Tnh nhit ng bng ca dung dch cha 1573 gam mui n tan trong 10 lt nc. Cho bit hng s nghim ng ca nc k = 1.86 /mol, xem NaCl trong dung dch in ly hon ton. (MNaCl = 58.5g/mol)

1. +100C 1. 100C 1. 50C 1. + 50C

Cu 36: Chn phng n ng: Tnh ca phn ng sau:C2H5OH(l ) + 3O2 (k) = CH3COOH(l) + H2O (l)Cho bit nhit t chy tiu chun 298K ca C2H5OH(l)v CH3COOH(l) c gi tr ln lt l: -1370kJ/mol v -874.5kJ/mol.

0. +495.5kJ/mol0. 495.5 kJ/mol0. -365.5 kJ/mol0. +365.5kJ/mol

Cu 37: Chn phng n ng:Cc phn ng di y ang trng thi cn bng 25OC. N2(k) + O2(k) 2NO(k), H0 0(1)N2(k) + 3H2(k) 2NH3(k), H0 0(2)MgCO3(r) CO2(k) + MgO(r), H0 0(3)I2(k) + H2(k) 2HI(k),H0 0(4)Cn bng ca phn ng no dch chuyn mnh nht theo chiu thun khi ng thi tng nhit v h p sut chung ca:

1. Phn ng 41. Phn ng 11. Phn ng 21. Phn ng 3

Cu 38: Chn phng n ng:1. H t trng thi cn bng th khi b sung lng cc cht phn ng vo s khng lm nh hng n trng thi cn bng.1. Nu ta cho vo h phn ng mt cht xc tc th cn bng ca h s b thay i.1. Khi tng nhit , cn bng s dch chuyn theo chiu thu nhit.1. Khi gim p sut, cn bng s dch chuyn theo chiu gim s phn t kh.Cu 39: Chn pht biu ng: Phn ng A (k) B (k) + C (k) 300oC c Kp = 11.5, 100oC c Kp = 33. Vy phn ng trn l mt qu trnh:

1. thu nhit.1. ng nhit.1. on nhit.1. ta nhit.

Cu 40: Chn phng n ng:Th in cc ca in cc kim loi c th thay i khi mt trong cc yu t sau thay i:1) Nng mui ca kim loi lm in cc2) Nhit 3) B mt tip xc gia kim loi vi dung dch4) Nng mui l5) Bn cht dung mi

1. Tt c cng ng1. Ch 3,4,5 ng1. Ch 1,2,4,5 ng1. Ch 1,2 ng

Cu 41: Chn phng n ng: Xt phn ng 250 C: N2(k) + 3H2(k) 2NH3(k) Cho bit 250C nng lng lin kt NN, H=H v NH ln lt l: 946; 436 v 388kJ/mol. Tnh hiu ng nhit phn ng to thnh 1 mol NH3(k).

1. 74kJ1. 48kJ1. 37kJ1. 24kJ

Cu 42: Chn phng n ng: Trong phn ng:3K2MnO4 + 2H2SO4 = 2KMnO4 + MnO2 + 2K2SO4 + 2H2OH2SO4 ng vai tr:

1. Cht to mi trng.1. Cht oxi ha1. Cht t oxi ha, t kh1. Cht kh

Cu 43: Chn gi tr ng. Tnh nhit ca ngn la CO chy trong khng kh (20% O2 v 80% N2 theo th tch). Lng oxy va cho phn ng:

CO(k) + O2(k) = CO2(k)Nhit ban u l 250C. Nhit dung mol ca cc cht (J/molK) Cp(CO2,k) = 30 v Cp(N2,k) = 27.2.

1. 3547 K1. 4100 K1. 2555 K1. 3651 K

Cu 44: Chn nhn xt ng.

Cho nguyn t Ganvanic gm in cc clo tiu chun (, NaCl 1M) (1) v in cc H2 (p sut ca Cl2 = 1 atm) nhng vo trong dung dch NaCl 0.1M (2). nhit nht nh nguyn t ny c:1. Sut in ng gim khi pha long dung dch in cc (1)1. in cc (1) lm in cc catod1. mch ngoi electron chuyn t in cc (2) sang in cc (1)1. Sut in ng ca pin 250C l 0.1VCu 45: Chn phng n ng: Cho cc phn ng sau thc hin iu kin ng p, ng nhit:N2 (k) + O2 (k) = 2NO (k) (1)KClO4 (r) = KCl (r) + 2O2 (k) (2)C2H2 (k) + 2H2 (k) = C2H6 (k) (3)Chn phn ng c kh nng sinh cng dn n (xem cc kh l l tng).

1. 1, 2, 3 ng1. Ch 3, 1 ng1. Ch 2 ng1. Ch 3 ng


Bit . So snh tan trong nc S ca Ag2CrO4 vi CuI cng nhit :

1.

1.

1.

1.

Cu 47: Chn phng n ng: S cc pin hot ng trn c s cc phn ng oxy ha kh:H2(k) + Cl2 (k) = 2HCl(dd)2Fe3+(dd) + Zn(r) = Zn2+(dd) + 2Fe2+(dd)l:1.

1.

1.

1.

Cu 48: Chn trng hp ng: Cho qu trnh in cc:

Phng trnh Nernst i vi qu trnh cho 250C c dng:

1.

1.

1.

1.

Cu 49: Chn phng n ng:Bit rng 370C (thn nhit) mu c p sut thm thu = 7.5atm. Tnh nng C ca cc cht tan trong mu ( R= 0.082 atm.l/mol.K)

1. 2.47 mol/l1. 1.34 mol/l 1. 0.295 mol/l1. 0.456 mol/l

Cu 50: Chn phng n ng: 2NO2(k) N2O4(k) ; Kp= 9.2 250C

1) Khi = 0.90atm; = 0.10atm, phn ng din theo chiu nghch.

2) Khi = 0.72atm; = 0.28atm, phn ng cn bng.

3) Khi = 0,10atm; = 0,90atm, phn ng din theo chiu thun.

4) Khi = 0.90atm; = 0.10atm, phn ng din theo chiu thun.

5) Khi = 0.72atm; = 0.28atm, phn ng din theo chiu nghch.

0. 2,3,40. 1,3,50. 1,2,3 0. 3,4,5

--- Ht ---


Th sinh ch c chn 1 trong 4 p n, trong trng hp c nhiu p n ph hp vi yu cu th ch chn p n ng v y nht. Th sinh khng c s dng ti liu k c bng h thng tun hon.Cu 1: Chn phng n ng:Cc phn ng di y ang trng thi cn bng 25OC. N2(k) + O2(k) 2NO(k), H0 0(1)N2(k) + 3H2(k) 2NH3(k), H0 0(2)MgCO3(r) CO2(k) + MgO(r), H0 0 (3)I2(k) + H2(k) 2HI(k), H0 0(4)Cn bng ca phn ng no dch chuyn mnh nht theo chiu thun khi ng thi h nhit v tng p sut chung ca:

1. Phn ng 31. Phn ng 11. Phn ng 41. Phn ng 2

Cu 2: Chn tt c cc pht biu sai:1) Dung dch long l dung dch cha bo ha v nng cht tan nh.2) Khi nhit tng th tan ca kh NO2 trong nc cng tng.3) Thnh phn ca mt hp cht l xc nh cn thnh phn ca dung dch c th thay i.4) Qu trnh ha tan cht rn khng ph thuc vo bn cht ca dung mi.

1. 2, 31. 1, 31. 41. 1, 2, 4

Cu 3: Tnh th kh chun 25oC. Cho bit 25oC, th kh chun ca cc cp oxi ha sau: ; .

1. 0.15 V1. -0.15 V1. -0.135 V1. 0.135 V

Cu 4: Chn phng n ng: S cc pin hot ng trn c s cc phn ng oxy ha kh:3Ag+(dd) + Cr (r) = Cr3+(dd) + 3Ag(r)2Fe2+(dd) + Cl2(k) = 2Fe3+(dd) + 2Cl-(dd) l:1. (-)CrCr3+(dd)Ag+(dd)Ag(+)(-) PtCl2(k)Cl-(dd) Fe2+(dd),Fe3+(dd)Pt (+)1. (-)AgAg+(dd)Cr3+(dd)Cr(+)(-) PtFe2+(dd),Fe3+(dd) Cl-(dd)Cl2 Pt (+)1. (-)CrCr3+(dd)Ag+(dd)Ag(+)(-) PtFe2+(dd), Fe3+(dd) Cl-(dd)Cl2 Pt (+)1. (-)AgAg+(dd)Cr3+(dd)Cr(+)(-) Pt Cl2(k)Cl-(dd) Fe2+(dd),Fe3+(dd)Pt (+)Cu 5: Tnh Go298 ca phn ng sau: CO (k) + H2O (k) = CO2 (k) + H2 (k)Cho bit: 2CO(k) + O2(k) = 2CO2 (k) ; Go298 = -514.6 kJ2H2(k) + O2 (k) = 2H2O (k); Go298 = -457.2 kJ

1. 37.8 kJ1. 28.7 kJ1. 57.4 kJ1. 43.6 kJ

Cu 6: Chn phng n ng:Cho 1 mol cht in ly AB2 vo nc th c 0.3 mol b in ly ra ion, vy h s ng trng i bng:

1. Khng th tnh c1. 1.91. 1.61. 2.1

Cu 7: Tnh Ho298 ca phn ng sau y: 4HCl(k) + O2(k) = 2H2O() + 2Cl2(k)Cho bit nhit to thnh tiu chun ca HCl(k), H2O() 25oC ln lt l: 92.30 v 285.8 kJ/mol.

1. 202.4 kJ/mol1. 193.5 kJ/mol1. + 202.4 kJ/mol1. + 193.5 kJ/mol

Cu 8: Chn phng n ng:Dung dch nc ca mt cht tan bay hi khng in ly si 105.2oC. Nng molan ca dung dch ny l: (hng s nghim si ca nc Ks = 0.52)

1. 101. 51. 11. Khng d liu tnh

Cu 9: Tnh Go298 ca phn ng: CH4 (k) + 2O2 (k) = 2H2O () + CO2 (k)Cho bit th ng p to thnh tiu chun ca CH4(k), H2O() v CO2(k) c gi tr ln lt l: -50.7; -237.0; -394.4 kJ/mol.

1. -817.7 kJ/mol1. + 580.7 kJ/mol1. + 817.7 kJ/mol1. -580.7 kJ/mol

Cu 10: Cho phn ng: 2Fe2O3(r) + 3C(gr) = 4Fe(r) + 3CO2(k)C Ho = + 467.9 kJ v So = + 560.3 J/KHy cho bit phi thc hin nhit no phn ng c th xy ra t pht (gi thit Ho v So khng thay i theo nhit ).

1. t > 835oC1. t > 742oC1. t > 618oC1. t > 562oC

Cu 11:Cho HgO (tinh th) vo bnh chn khng phn ly nhit 500oC, xy ra cn bng sau: 2 HgO (tinh th) 2 Hg (k) + O2 (k)Khi cn bng p sut trong bnh l 4.0 atm. Tnh Go ca phn ng 500oC. Cho R = 8.314 J/mol.K

1. 14.5 kJ 1. 8.4 kJ1. 31.8 kJ1. 23.7 kJ

Cu 12:Xc nh khi lng mol ca dinitrobenzen, bit rng nu ha tan 1.00g cht ny trong 50.0 g benzen th nhit si tng ln 0.30oC. Cho bit ks (C6H6) = 2.53 /mol.

1. 157 g/mol1. 174 g/mol1. 183 g/mol1. 168 g/mol

Cu 13: Tnh Ho298 ca phn ng sau: C2H2(k) + 2H2(k) = C2H6(k)Cho bit nng lng lin kt iu kin chun, 25oC.E (C-C) = 347.3 kJ/mol E (C-H) = 412.9 kJ/molE (H-H) = 435.5 kJ/molE (CC) = 810.9 kJ/mol

1. 912 kJ1. 752.5 kJ1. 317 kJ1. 524.8 kJ

Cu 14: Chn phng n ng:Cho nguyn t Ganvanic gm in cc hidro tiu chun (1) v in cc H2(, Pt) nhng vo trong dung dch HCl 0.1M (2). nhit nht nh nguyn t ny c: 1. th in cc ca in cc (2) tng khi nng ca dung dch HCl gim1. Qu trnh oxy ha xy ra trn in cc (1)1. Sc in ng tng khi pha long dung dch in cc (2)1. in cc (2) l catodCu 15Xc nh in ly biu kin ca HIO3 trong dung dch cha 0.506g HIO3 v 22.48g C2H5OH. Dung dch ny bt u si 351.624K. Cho bit C2H5OH si 351.460K; hng s nghim si ks(C2H5OH) = 1.19 /mol v MHIO3 = 176.0 g/mol.

1. 17%1. 12.2%1. 7.8%1. 24%

Cu 16: Chn pht biu ng. So snh entropy ca cc cht sau iu kin chun.1) O(k) > O2(k) > O3(k) 2) NO(k) > NO2(k) > N2O3(k)3) 3Li (r) > 4Be (r) > 4B (r)4) C (graphit) > C (kim cng)5) I2 (r) > I2 (k)6) N2 (25oC, kh) > N2 (100oC, kh)7) O2 (1atm, 25oC, kh) > O2 (5atm, 25oC, kh)

1. 3, 4, 71. 2, 4, 61. 1, 2, 61. 5, 7

Cu 17Tnh khi lng mol ca hemoglobin (l cht tan khng in ly, khng bay hi), bit rng p sut thm thu ca dung dch cha 35.0g hemoglobin trong 1 dung dch (dung mi l nc) l 10.0 mmHg 25oC. Cho R = 62.4 .mmHg/mol.K

1. 6.5 . 104 g/mol1. 7.3 . 104 g/mol1. 8.1 . 104 g/mol1. 5.8 . 104 g/mol

Cu 18: Chn phng n ng:Cho bit tch s tan ca AgIO3 v PbF2 bng nhau (T = 1 10-7.52 ). So snh nng cc ion:

1. [F-] > [Pb2+] > [IO3-] = [Ag+]1. [F-] > [Pb2+] < [IO3-] = [Ag+]1. [Ag+] = [IO3-] > [F-] > [Pb2+]1. [Ag+] = [IO3-] = [F-] = [Pb2+]

Cu 19: Tnh hng s cn bng K ca phn ng sau 25oC:3 Au+ (dd) Au3+ (dd) + 2 Au (r). Cho bit 25oC: ; ; F = 96500; R = 8.314 J/mol.K

1. 4.5 1091. 2.5 1091. 1.41 10101. 3.1 1012

Cu 20: Cho th kh tiu chun ca cc bn phn ng sau:Fe3+(dd) + e = Fe2+(dd), o = 0.77 V; I2(r) + 2e = 2I-(dd), o = 0.54 VPhn ng: 2 Fe2+(dd) + I2(r) = 2 Fe3+(dd) + 2 I-(dd) c c im:1. Eo = -1.00 V; phn ng khng th xy ra t pht iu kin tiu chun.1. Eo = 1.00 V; phn ng c th xy ra t pht iu kin tiu chun.1. Eo = 0.23 V; phn ng c th xy ra t pht iu kin tiu chun.1. Eo = -0.23 V; phn ng khng th xy ra t pht iu kin tiu chun.Cu 21: Chn phng n ng: Phn ng Mg(r) + 2HCl(dd) MgCl2(dd) + H2(k) l phn ng ta nhit mnh. Xt du o, So, Go ca phn ng ny 25oC:

1. Ho > 0; So > 0 ; Go < 01. Ho < 0; So > 0 ; Go > 01. Ho < 0; So < 0 ; Go < 01. Ho < 0; So > 0 ; Go < 0

Cu 22: Chn phng n ng:Phn ng FeO(r) + CO(k) Fe(r) + CO2(k) c hng s cn bng . p sut hi ca Fe v FeO khng c mt trong biu thc Kp v:1. C th xem p sut hi ca Fe v FeO bng 1 atm.1. p sut hi ca Fe v FeO l hng s nhit xc nh.1. p sut hi cht rn khng ph thuc vo nhit .1. p sut hi ca cht rn khng ng k.Cu 23: Chn phng n ng:Trong dung dch HCN 0.1M 250C c 8.5% HCN b ion ha. Hi hng s in li ca HCN nhit ny bng bao nhiu?

1. 7.2 10-21. 7.9 10-21. 7.2 10-41. 7.9 10-4

Cu 24: Tnh nhit to thnh tiu chun ca anion Br (k), vi phn ng c th l: Br2 (l) + 1e = Br (k)Cho bit:Nhit to thnh tiu chun ca Br2(k) l 31.0 kJ/mol.Nhit lng phn ly lin kt ca Br2(k) l 190.0 kJ/mol.Phn ng: Br(k) + 1e = Br (k) c Ho298, p = 325.0 kJ/mol.

1. 460.0 kJ/mol1. 429.0 kJ/mol1. 135.0 kJ/mol1. 214.5 kJ/mol

Cu 25: Chn cu ng. i vi dung dch long ca cht tan khng in ly, khng bay hi:1. p sut hi bo ha ca dung mi trong dung dch t l thun vi phn mol ca cht tan trong dung dch.1. gim tng i p sut hi bo ha ca dung mi trong dung dch bng phn mol ca dung mi trong dung dch.1. p sut hi bo ha ca dung mi trong dung dch lun nh hn p sut hi bo ha ca dung mi tinh khit cng gi tr nhit .1. p sut hi bo ha ca dung dch long phn t ph thuc vo bn cht ca cht tan.Cu 26: Chn phng n ng: 25oC, p sut hi bo ha ca nc nguyn cht l 23.76mmHg. Khi ha tan 2.7mol glyxerin vo 100mol H2O nhit trn th gim tng i p sut hi bo ha ca dung dch so vi nc nguyn cht bng:

1. 0.0261. 0.0421. 0.9741. 0.625

Cu 27: Chn phng n ng: Cho cc s liu sau:1) o (Al3+/Al) = - 1.706 V 2) o (Zn2+/Zn) = - 0.764 V3) o (Cu2+/Cu+) = + 0.15 V4) o (Cu+/Cu) = + 0.522 VCc cht c sp xp theo th t tnh oxy ha tng dn nh sau:

1. Al3+ < Zn2+ < Cu2+ < Cu +1. Cu + < Cu 2+ < Zn2+ < Al3+1. Al < Zn < Cu + < Cu1. Cu < Cu + < Zn < Al

Cu 28:Trc y, ngi ta khng khng r ion thy ngn (I) tn ti trong dung dch di dng vi gi tr n bng bao nhiu. xc nh n, c th lp mt pin nh sau 25oC.Pt, Hg()| dd A|| dd B| Hg(), Pt1 lit dung dch A cha 0.263g Hg(I) nitrat v 1 lit dung dch B cha 2.630g Hg(I) nitrat. Sc in ng o c l 0.0289 V. Hy xc nh gi tr ca n.

1. n = 31. n = 41. n = 11. n = 2

Cu 29: Chn pht biu ng: Phn ng A (k) B (k) + C (k) 300oC c Kp = 11.5; 500oC c Kp = 23. Tnh Ho ca phn ng trn. Cho R = 8.314 J/mol.K.

1. Ho = + 4.32 kJ1. Ho = + 12.76 kJ1. Ho = -12.76 kJ1. Ho = - 4.32 kJ

Cu 30: Chn phng n ng:Bit tch s tan 25oC ca Al(OH)3 l 110-32. Dung dch AlCl3 0.1M s xut hin kt ta khi c pH ca dung dch:

1. < 3.71. 3.71. > 3.71. > 10.3

Cu 31:Theo nh ngha ca nhit to thnh, trong cc phn ng sau, phn ng no c xem l phn ng to thnh 298K1) N (k) + 2O (k) = NO2 (k) 2) N2 (k) + O2 (k) = NO (k)3) CaO (r) + CO2 (k) = CaCO3 (r) 4) Na () + Cl2 (k) = NaCl (r)5) H2 (k) + I2 (r) = HI (k)

1. 2, 51. 2, 3, 41. 1, 4, 51. 1, 5

Cu 32: Chn phng n ng: Trn cc dung dch: 1) 100ml dung dch AgNO3 2104M vi 50ml dung dch K2CrO4 6103M2) 100ml dung dch AgNO3 2104M vi 50ml dung dch K2CrO4 6104M3) 100ml dung dch AgNO3 2104M vi 50ml dung dch K2CrO4 6105MTrong trng hp no c s to thnh kt ta Ag2CrO4? Cho bit tch s tan ca Ag2CrO4 l T = 2 1012.

1. C 3 trng hp.1. Ch c trng hp (1)1. Cc trng hp (1) v (2)1. Ch c trng hp (2)

Cu 33: Chn pht biu ng. Thit lp biu thc G ca phn ng sau 25oC.2 Hg () + O2 (k) 2HgO (tinh th)

1. 1. 1. 1.

Cu 34: Chn h s t lng ng. Cn bng phng trnh phn ng di y:NaClO3 + MnO2 + NaOH Na2MnO4 + NaCl + H2ONu h s trc NaClO3 l 1 th h s ng trc MnO2 v NaOH ln lt l:

1. 6, 31. 5, 31. 3, 51. 3, 6

Cu 35: Chn phng n ng: Cho cn bng CO2(k) + H2(k) CO(k) + H2O(k)Tnh hng s cn bng Kc ca phn ng. Bit rng phn ng c thc hin trong bnh kn c dung tch 1 lt cha 0.3 mol CO2 v 0.3 mol H2 lc ban u. Khi phn ng cn bng ta c 0.2 mol CO to thnh. Nu nn h cho th tch ca h gim xung, cn bng s chuyn dch nh th no?

1. Kc = 8 ; theo chiu nghch1. Kc = 8 ; theo chiu thun1. Kc = 4 ; khng i1. Kc = 4 ; theo chiu thun

Cu 36: Chn phng n ng: Cc thng s u c thuc tnh cng l:

1. Th ng p, entanpi, th tch1. Th kh, nhit , khi lng ring1. Th ng p, nhit , ni nng 1. Entropi, khi lng, s mol

Cu 37:Mt bnh on nhit c tch thnh hai ngn dung tch bng nhau: ngn th nht cha 2.0 mol hydro 3.0 atm v 25oC; ngn th hai cha 3.0 mol argon 4.5 atm v 25oC. Hai kh c coi l l tng. Ngi ta nhc vch ngn ra, hai kh trn ln vo nhau, khng phn ng. Hy tnh G ca hn hp. Cho R = 8.314 J/mol.K.

1. 15.3 kJ1. 18.7 kJ1. 24.6 kJ1. 8.59 kJ

Cu 38:Tnh cng dn n khi cho 10mol CH3CHOHCH3 vo bnh chn khng, phn ly 177oC theo phn ng sau: CH3CHOHCH3 (k) CH3COCH3 (k) + H2 (k)Cho bit R = 8.314 J/mol.K, xem cc kh trong phn ng l kh l tng.

1. 3.741 J1. 37.41 J1. 1.47 J1. 14.72 J

Cu 39: Chn phng n ng: Cho phn ng: C6H6 + O2(k) 6CO2(k) + 3H2O 270C phn ng c H U = 3741.3 J. Hi C6H6 v H2O trong phn ng trng thi lng hay kh? Cho bit R = 8.314 J/mol.K.

1. C6H6(k) v H2O()1. C6H6(k) v H2O(k)1. C6H6() v H2O(k)1. C6H6() v H2O()

Cu 40: Chn phng n ng. Cho qu trnh in cc: 3Fe3+(dd) + 4H2O() + 1e Fe3O4(r) + 8H+(dd)Phng trnh Nerst i vi qu trnh cho 250C c dng:

1.

1.

1.

1.

Cu 41: Hy xc nh gi tr no ca pH th phn ng sau bt u xy ra theo chiu thun 25oC.HAsO2(dd) + I2(r) + 2H2O() H3AsO4(dd) + 2I- (dd) + 2H+ (dd)Cho bit, 25oC: ; Nng cc cht: [H3AsO4]=[I-]=[HAsO2] = 1M

1. pH > 0.41. pH > 3.01. pH > 1.01. pH > 2.0

Cu 42: Chn phng n ng:Trong 200g dung mi cha A g ng gluc c khi lng phn t M; hng s nghim ng ca dung mi l K. Hi biu thc no ng i vi T:

1. 1. 1. 1.

Cu 43: Tnh hng s cn bng K 25oC ca phn ng sau:3ZnS(r) + 2NO3-(dd) + 8H+(dd) 3Zn2+(dd) + 2NO(k) + 4H2O() + 3S(r)Cho bit 25oC:Tch s tan ca ZnS l TZnS = 210-24Hng s in ly ca H2S l Ka1 . Ka2 = 310-20Phn ng: 3H2S(dd) + 2NO3-(dd) + 2H+(dd) 2NO(k) + 4H2O() + 3S(r) c hng s cn bng K = 1083

1. 4 10541. 3 10701. 2 10611. 6 1047

Cu 44: Chn phng n ng: Cho gin ha tan nh hnh sau:

Ha tan hon ton 10g KClO3 vo 100g nc 40oC, gi s nc khng b ha hi nhit ny. Sau dung dch c a v nhit 30oC v khng c kt ta xut hin. Vy trng thi dung dch thu c 30oC l:

1. Khng c s xc nh.1. Dung dch cha bo ha.1. Dung dch bo ha.1. Dung dch qu bo ha.

Cu 45: Chn pht biu sai:Xt phn ng t chy metan iu kin ng p, ng nhit 25oC:CH4(k) + 2O2(k) = CO2(k) + 2H2O(k) , Ho298, p = 758.23 kJ/mol. (Coi cc kh trong phn ng l kh l tng)1) Nhit phn ng chun ng tch 25oC ca phn ng trn l 758.23 kJ.2) Phn ng trn khng sinh cng dn n.3) bin thin entropy chun ca phn ng 25oC gn bng 0.4) 25oC, hng s cn bng KP > KC.

1. 31. 11. 21. 4

Cu 46: Chn phng n ng:Nh tng git dung dch (NH4)2C2O4 0.01M vo 1 lt dung dch cha 1 ion gam Ba2+ v 0.005 ion gam Ca2+ . Hi kt ta no xut hin trc? (Cho tch s tan ca BaC2O4 v CaC2O4 ln lt bng 10-6.96 v 10-8.64).

1. C 2 kt ta xut hin cng lc 1. BaC2O41. CaC2O41. Khng xc nh c

Cu 47: Tnh hng s cn bng KC 25oC ca phn ng sau: CuCl (r) + I- (dd) CuI (r) + Cl- (r)Bit ti nhit ny: TCuCl = 1.9 10-7; TCuI = 5.1 10-12

1. 2.7 10-51. 3.7 1041. 9.7 10-191. 4.4 1017

Cu 48Hy cho bit dng (tinh th) v dng (tinh th), dng no bn hn iu kin chun, 25oC. Bit phn ng: (tinh th) (tinh th) c Ho298 = 1.55 103 J/mol v So298 = 0.545 J/mol.

1. (tinh th)1. Khng d kin so snh1. C 2 dng bn nh nhau1. (tinh th)

Cu 49:So snh p sut thm thu ca cc dung dch sau: CH3COOH (1), C6H12O6 (2), NaCl (3), CaCl2 (4) cng c nng 0,01M v cng mt nhit (xem cc mui NaCl v CaCl2 in ly hon ton).

1. 4 < 3 < 1 < 21. 4 < 3 < 2 < 1 1. 2 < 1 < 3 < 4 1. 1 < 2 < 3 < 4

Cu 50: Chn pht biu chnh xc:1) in ly () tng khi nng ca cht in li tng.2) in ly () khng th ln hn 1.3) Trong a s trng hp, in ly tng ln khi nhit tng.4) Cht in ly yu l cht c < 0.03

1. 2, 31. 1, 2, 31. Tt c u ng1. 3, 4

--- Ht ---


Th sinh ch c chn 1 trong 4 p n, trong trng hp c nhiu p n ph hp vi yu cu th ch chn p n ng v y nht. Th sinh khng c s dng ti liu k c bng h thng tun hon. Cu 2: Chn phng n ng:Cho mt phn ng thun nghch trong dung dch lng: A + B 2C + D. Hng s cn bng Kc iu kin cho trc bng 50. Mt hn hp c nng CA = CB = 10-3M, CC = CD = 0.01M. Trng thi ca h iu kin ny nh sau:1. H ang dch chuyn theo chiu thun.1. H ang dch chuyn theo chiu nghch.1. H nm trng thi cn bng.1. Khng th d on c trng thi ca phn ngCu 4: Chn phng n ng: 1 lt dung dch nc cha 2g cht tan khng in ly, khng bay hi c p sut thm thu = 0.2 atm 250C. Hy tnh khi lng mol ca cht (cho R = 0.082 lt.atm/mol.K = 8.314 J/mol.K = 1.987 cal/mol.K)

1. 244 g/mol1. 20.5 g/mol1. 208 g/mol1. Khng d liu tnh

Cu 5: Chn trng hp ng: Cho bit tch s tan ca AgCl 250C l 1010.1) tan ca AgCl trong nc nguyn cht l 105 mol/l.2) tan ca AgCl trong dung dch KCl 0.1M gim i 107 ln so vi trong nc nguyn cht.3) tan ca AgCl trong nc s t hn trong dung dch KI 0.1M.4) tan ca AgCl trong dung mi benzen s ln hn trong dung mi nc.

1. 1,21. 2,41. 1,31. 1,3,4

Cu 6: Chn phng n ng: Trong phn ng: 3Cl2 +KI + 6KOH = 6KCl + KIO3 + 3H2OKOH ng vai tr:

1. Cht oxi ha1. Cht kh1. Cht to mi trng.1. Cht t oxi ha, t kh

Cu 8: Chn phng n ng:Phn ng 2HI(k) H2(k) + I2(k) c hng s cn bng KP = 9. cng nhit , phn ng s din ra theo chiu no khi p sut ring phn ca H2, I2 v HI ln lt l 0.2; 0.45 v 0.1 atm.1. Phn ng din ra theo chiu thun.1. Phn ng din ra theo chiu nghch.1. Khng th d on c trng thi ca phn ng1. Phn ng trng thi cn bng.Cu 9: Chn phng n ng: Trn cc dung dch:1) 100ml dung dch AgNO3 10-4M vi 100ml dung dch HCl 10-5M2) 100ml dung dch AgNO3 10-4M vi 100ml dung dch NaCl 10-4M3) 100ml dung dch AgNO3 10-4M vi 100ml dung dch HCl 10-6 MTrong trng hp no c s to thnh kt ta AgCl? Cho tch s tan ca AgCl l T = 10 -9.6.

1. Ch c trng hp (1)1. C 3 trng hp.1. Ch c trng hp (2)1. Cc trng hp (1), (2)

Cu 11: Chn phng n ng: Cho phn ng oxy ha kh: HI + H2SO4 = I2 + S + H2OCn bng phn ng trn. Nu h s trc H2SO4 l 1 th h s ng trc HI v I2 ln lt l:

1. 2 v 11. 6 v 31. 8 v 41. 4 v 2

Cu 12: Chn trng hp ng. Bit rng nhit to thnh tiu chun ca AsH3 (k), NH3(k), PH3 (k) v C2H4 (k) ln lt bng: 66.44 ; -46.11; 5.4 ; 52.26 (kJ/mol). Trong 4 cht ny, cht d b phn hy thnh n cht nht l:

1. C2H41. PH31. AsH31. NH3

Cu 13: Chn cu tr li ng. Hiu ng nhit ng p ca mi phn ng ha hc:1. Khng ph thuc vo trng thi tp hp ca cc cht sn phm.1. Khng ph thuc vo cch vit cc h s t lng ca phng trnh phn ng.1. Ph thuc vo nhit phn ng1. Ph thuc vo cch tin hnh phn ngCu 15: Chn phng n ng v y :

Cho pin in ha: 1) in cc (1) gi l cathode, c xut hin kt ta Crom 2) in cc (2) gi l anod, in cc Crom b tan ra 3) Sut in ng ca pin l E = 0.0334V4) Trong qu trnh pin hot ng, nng Cr3+(dd) in cc (1) gim dn v in cc (2) tng dn. Khi nng Cr3+(dd) hai in cc bng nhau th pin ngng hot ng.

1. 1,2,3,41. 1,21. 3,41. 1,2,4

Cu 16: Chn trng hp ng. Qu trnh ng c nc -1oC v 1 atm c:

1. S < 0, H < 0, G < 01. S < 0, H < 0, G > 01. S < 0, H > 0, G < 01. S >0, H < 0, G < 0

Cu 17: Chn phng n ng: Xt chiu ca phn ng 250C: Fe + Cd2+ = Fe2+ +Cd, Cho bit: E0 = 0(Cd2+/Cd) - 0(Fe2+/Fe) = 0.04V1) Khi [Fe2+] = 0.10M v [Cd2+] = 1.00M phn ng din ra theo chiu thun2) Khi [Fe2+] = 0.10M v [Cd2+] = 1.00M phn ng din ra theo chiu nghch3) Khi [Fe2+] = 1.00M v [Cd2+] = 0.01M ng din ra theo chiu thun4) Khi [Fe2+] = 1.00M v [Cd2+] = 0.01M ng din ra theo chiu nghch

1. 2, 41. 1, 4 1. 2, 31. 1, 3

Cu 19: Chn phng n ng: Trong a s trng hp in ly ca cht in ly:1. Tng ln khi gim nhit v tng nng dung dch.1. L hng s nng xc nh.1. L hng s nhit xc nh.1. Tng ln khi tng nhit v gim nng dung dch.Cu 20: Chn p n ng:Mt phn ng kt thc sau 160 pht 40oC. nhit no phn ng s kt thc sau 20 pht, bit h s nhit ca phn ng l 2.

1. 70oC1. 30oC1. 50oC1. 60oC

Cu 21: Chn phng n ng: Phn ng n gin:2HI = I2 + H2 c biu thc tc phn ng l: v = k[HI]2. T suy ra rng:1. Hai phn t HI tc dng vi nhau to I2 v H2.1. Mt phn t HI t phn hy thnh cc nguyn t I v H, sau cc nguyn t I v H kt hp li to I2 v H2 .1. Biu thc v = k[HI]2 c xc nh da vo phng trnh phn ng.1. Khng th vit phng trnh phn ng dng HI = I2 + H2 Cu 22: Chn phng n ng: Tc phn ng d th:1. ch c quyt nh bi tng tc ha hc ca bn thn cht phn ng.1. tng ln khi tng b mt tip xc pha1. ph thuc vo b mt tip xc pha m khng ph thuc vo nng cht phn ng.1. ca bt k phn ng no cng tng ln khi khuy trnCu 23: Chn phng n ng: Trong cc phn ng:N2 (k) + O2 (k) = 2NO (k) (1)KClO4 (r) = KCl (r) + 2O2 (k) (2)C2H2 (k) + 2H2 (k) = C2H6 (k) (3)Chn phn ng c S ln nht, S nh nht (cho kt qu theo th t va nu)

1. 1 , 31. 3 , 11. 1 , 21. 2 , 3

Cu 24: Chn phng n ng: Tnh hng s cn bng ca phn ng:NH4Cl(dd) + Na2S(dd) + H2O = NH4OH(dd) + NaHS(dd) + NaCl(dd)(Bit hng s in ly ca H2S Ka1 = 1 10 6.99, Ka2 = 1 1012.89, hng s in ly ca NH4OH Kb = 1 104.76 v tch s ion ca nc Kn = 1 1014).

1. 1 102.251. 1 1010.641. 1 1010.641. 1 103.65

Cu 25: Chn phng n ng v y :1) Mt h ang trng thi cn bng, nu ta thay i mt trong cc yu t (p sut, nhit , nng ) th cn bng s chuyn dch theo chiu chng li s thay i .2) Khi tng nhit , cn bng s chuyn dch theo chiu phn ng ta nhit; khi gim nhit , cn bng s chuyn dch theo chiu phn ng thu nhit.3) Hng s cn bng ca mt phn ng l mt i lng khng i nhit xc nh.4) Khi thm mt cht (tc cht hay sn phm) vo h cn bng, cn bng s dch chuyn theo chiu lm gim lng cht .

1. 1 v 31. 1 v 41. 1 , 3 v 41. 1 v

Cu 27: Chn phng n ng: 400C v 600C, KNO3 c ha tan trong nc ln lt l C1 = 63.9 g/100g nc, C2 = 109.9 g/100g nc. Hy tnh nhit ha tan trong nc H ca KNO3 trong khong nhit .

1. -25.5 kJ/mol1. +25.5 kJ/mol1. +51 kJ/mol1. -51 kJ/mol

Cu 28: Chn phng n ng: Khi tng nhit , vn tc phn ng tng v s tng nhit :1. lm gim hng s tc ca phn ng1. lm cho G < 0.1. lm tng s tiu phn hot ng trong h1. ch yu l lm tng s ln va chm gia cc phn t.

Cu 31: Chn phng n ng: My o pH hot ng da vo vic o hiu in th gia in cc calomen bo ho KCl: Pt, Hg Hg2Cl2 KCl bo ha (c th in cc n nh = + 0.268V) v in cc hydro: Pt H2 1 atm H+ (dung dch cn o pH). Hy tnh pH ca dung dch 250C nu hiu in th ca hai in cc ny l 0.327V.

1. 5.01. 1.01. 4.01. 3.0

Cu 32: Chn phng n ng: Cho bit:

1) o (,H2O/S) = 0.75V 2) o (Sn2+/Sn) = 0.140V3) o (HClO/Cl-) = +1.64V4) o (Fe3+/Fe2+) = + 0.771VCc cht c sp xp theo th t tnh oxy ha tng dn nh sau:

1. HClO < Fe3+ < Sn2+ < 1. < Sn2+ < Fe3+ < HClO1. S < Sn < Fe2+ < Cl1. Cl < Fe2+ < Sn < S

Cu 33: Chn phng n ng:1) cng p sut ngoi, cht lng nguyn cht no c p sut hi bo ha cng ln th nhit si cng thp.2) Khi p sut ngoi tng th nhit si ca cht lng nguyn cht s tng3) Khi p sut ngoi khng i, nhit si ca cht lng nguyn cht l hng s.4) Nhit si ca cht lng nguyn cht l nhit ti p sut hi bo ha ca cht lng bng vi p sut ngoi.

1. 1,21. 3,41. 1,2,3,41. 1,2,4

Cu 34: Chn phng n ng:Mt lt dung dch cha 5g mui n NaCl v 1 lt dung dch cha 20g ng C6H12O6. Cho bit khi lng nguyn t ca Na, Cl, C, O, H ln lt l 23; 35.5; 12; 16; 1. Gi s in ly ca dung dch mui l 1. cng nhit :0. Dung dch mui c nhit bt u ng c cao hn0. Khng th so snh c v khc nhau v nng v bn cht cht tan.0. Dung dch ng c nhit bt u si cao hn.0. Dung dch mui c p sut thm thu ln hnCu 35: Chn qu trnh ng: Xt phn ng: NO(k) + O2(k) = NO2(k) Phn ng c thc hin trong xilanh vi pistong chu mt p sut khng i, sau phn ng c a v nhit ban u. Qu trnh nh th l qu trnh:

1. ng tch, ng nhit1. ng p, th tch gim1. ng p, ng nhit1. ng p, th tch tng

Cu 36: Chn phng n ng: Tnh bin thin entropi ca s hnh thnh 1 mol hn hp kh l tng gm 20% N2, 50% H2 v 30% NH3 theo th tch. Hn hp ny c hnh thnh do s khuych tn ba kh vo nhau cng nhit v p sut. H c xem l c lp. Cho R = 8.314 J/molK.

1. 4.81 J/K1. 10.31 J/K1. 6.15 J/K1. 8.56 J/K

Cu 37: Chn phng n sai:1. Phn ng ta nhit nhiu thng c kh nng xy ra nhit thng. 1. Phn ng c Go < 0 c th xy ra t pht.1. Phn ng c Go > 0 khng th xy ra t pht mi iu kin.1. Phn ng c cc bin thin entanpi v entropi u dng c kh nng xy ra nhit cao.Cu 38: Chn phng n ng: S cc pin hot ng trn c s cc phn ng oxy ha kh:

3Cl2 +I + 6OH = 6Cl + + 3H2O

+ 3MnO2 + 6OH 3 + Cl (dd) + 3H2O1.

1.

1.

1.

Cu 39: Chn trng hp ng: Xt cn bng:

Mu hng mu xanhTrong trng hp no dung dch c mu hng?

1. Lm lnh dd bng nc .1. un nng h.1. nhit phng.1. Cho thm NaCl vo h.

Cu 41: Chn trng hp ng.

Tnh pH ca dung dch bo ha Mg(OH)2 250C. Bit

1. 10.131. 10.631. 10.431. 10.33

Cu 42: Chn phng n ng:Trong dung dch HA 0.1M 250C c 10% HA b ion ha. Hi hng s in li ca HA nhit ny bng bao nhiu?

1. 1.0 .10-31. 1.1 .10-31. 1.1 .10-41. 1.0 .10-4

Cu 43: Chn phng n ng: nhit cao, cc qu trnh c kh nng d xy ra hn c l:

1. C bin thin entropi tng1. C bin thin entanpi tng1. C bin thin entanpi gim1. C bin thin entropi gim


Cho v . Tnh hng s cn bng 25oC ca phn ng 2Fe3+(dd) + Sn2+(dd) 2Fe2+(dd) + Sn4+(dd)

1. 10271. 10141. 10181. 1021

Cu 45: Chn phng n ng: Cho 1 mol cht in ly AB2 vo nc th c 0.2 mol b in ly ra ion, vy h s ng trng i bng:

1. 1,41. 1.61. Khng tnh c.1. 1.9

Cu 46: Chn phng n ng:Tnh hiu ng nhit 250C ca phn ng: CO(k) + H2O(k) = CO2(k) + H2(k) khi c 1g CO tham gia phn ng. Cho bit (kJ/mol) ca CO(k), H2O(k), CO2(k), ln lt l: -110.52; -241.82; -393.51.

1. 41.17 kJ1. 1.47 kJ1. +1.47 kJ

1. khng tnh c v khng c gi tr ca H2Cu 47: Chn phng n ng:

Cho qu trnh in cc: + 14H+ + 6e 2Cr3+ + 7H2OPhng trnh Nerst i vi qu trnh cho 250C c dng:

1.

1.

1.

1.

Cu 48: Chn pht biu sai. 1. Tt c cc qu trnh sinh cng c ch l qu trnh t xy ra.1. iu kin bnh thng, cc qu trnh to nhiu nhit l qu trnh c kh nng t xy ra1. Tt c cc qu trnh bt thun nghch trong t nhin l qu trnh t xy ra.1. Tt c cc qu trnh km theo s tng hn lon ca h l qu trnh t xy ra.Cu 49: Chn phng n ng:Hy sp xp cc dung dch sau theo th t pH tng dn: HCl 0.2M (1); HCl 0.1M (2); H2SO4 0.1M (3); HF 0.1M (4); NaOH 10-9M (5); NH4OH 0.1M (6); NaOH 0.1M (7).

1. 1 < 3 < 2 < 4 < 5 < 6 < 71. 1 < 3 = 2 < 4 < 7 < 5 < 61. 2 < 3 < 1 < 4 < 6 < 5 < 71. 1 = 3 < 2 < 4 < 6 < 5 < 7

Cu 50: Chn phng n sai: Hng s tc phn ng:1. khng ph thuc cht xc tc.1. ph thuc nng lng hot ha ca phn ng1. khng ph thuc nng cht phn ng.1. ph thuc nhit .Cu 52: Chn phng n ng: cng cc iu kin, dung dch in ly so vi dung dch phn t (cht tan khng bay hi) c:1. p sut hi bo ha cao hn, nhit si cao hn.1. Nhit ng c cao hn, p sut hi bo ha cao hn.1. p sut hi bo ha thp hn, nhit ng c cao hn.1. p sut hi bo ha thp hn, nhit si cao hn.Cu 53: Chn phng n ng:

Tnh ca phn ng: 2Mg(r) + CO2(k) = 2MgO(r) + C(gr).

Bit (J/mol.K) ca cc cht: Mg(r), CO2(k), MgO(r) v C(gr) ln lt bng: 33; 214; 27 v 6.

1. 208 J/K1. -187 J/K1. -220 J/K1. -214 J/K

Cu 54: Chn phng n sai: Cht xc tc:1. Khng lm thay i cc c trng nhit ng ca phn ng.1. Lm thay i hng s cn bng ca phn ng.1. Ch c tc dng xc tc vi mt phn ng nht nh.1. Lm gim nng lng hot ha ca phn ng.Cu 55: Chn trng hp ng:

Tnh th kh chun 250C trong mi trng acid. Cho bit th kh chun 250C trong mi trng acid: v

1. 0.627V1. 0.667V1. 1.33V1. 0.771V

Cu 56: Chn cu ng:1) Cng thc tnh cng dn n A = nRT ch ng cho h kh l tng.2) Trong trng hp tng qut, khi cung cp cho h ng tch mt lng nhit Q th ton b lng nhit Q s ch lm tng ni nng ca h 3) Bin thin ni nng ca phn ng ha hc chnh l hiu ng nhit ca phn ng trong iu kin ng tch.

1. 1,3 1. 1,2 1. Khng c cu ng1. Tt c cng ng

Cu 57: Chn phng n ng: Phn ng gia bt MnO2 v dung dch NaCl trong mi trng acid khng xy ra. Mun phn ng xy ra phi dng bin php no?

Cho: = 1.2V; =1.358V

1. Thm HCl m c. 1. Thm NaOH.1. Tng nng NaCl.

1. Khng c cch no ngoi tr thay th MnO2 bng cht oxi ha khc.Cu 58: Chn cu ng:1) Entanpi l mt hm trng thi v l mt thng s cng .2) p sut l mt hm trng thi v l mt thng s cng .3) Nhit , khi lng, thnh phn l cc thng s dung .

0. 2 0. 1 v2 0. 2 v 3 0. 1

Cu 59: Chn phng n ng: Lp cng thc tnh hiu ng nhit (0 ) ca phn ng 2A B, thng qua hiu ng nhit ca cc phn ng sau:A C , 1A D , 2D + C E , 3E B , 4

1. 0 = 1 + 2 + 3 + 4 1. 0 = 3 + 2 - 1 + 4 1. 0 = -1 + 2 - 3 + 4 1. 0 = -1 - 2 + 3 + 4

Cu 60: Chn phng n ng:Hy ch r cht no trong cc cht di y c gi tr entropi tiu chun cao hn:1) 20Ca(r) v 12Mg(r)2) H2O(k) v H2S(k) 3) PCl3(k) v PCl5(k)4) Cl2(k) v F2(k)5) Br2(l) v I2(r)

1. Ca, H2S, PCl5, Cl2, I21. Mg, H2O, PCl3, F2, I21. Mg, H2O, PCl3, F2, Br21. Ca, H2S, PCl5, Cl2, Br2

--- Ht ---


Th sinh ch c chn 1 trong 4 p n, trong trng hp c nhiu p n ph hp vi yu cu th ch chn p n ng v y nht. Th sinh khng c s dng ti liu k c bng h thng tun hon.Cu 1: Chn p n ng. Cho bit pT ca BaSO4 v SrSO4 ln lt bng 9.97 v 6.49. Nh tng git dung dch (NH4)2SO4 0.1M vo 1 lt dung dch cha 0.001 ion gam Ba2+ v 1 ion gam Sr2+ th:

1. Kt ta BaSO4 xut hin trc.1. C 2 kt ta xut hin ng thi.1. Kt ta SrSO4 xut hin trc.1. Khng to thnh kt ta.

Cu 2: Chn phng n ng: Lp cng thc tnh hiu ng nhit (0) ca phn ng B A, thng qua hiu ng nhit ca cc phn ng sau: A C , 1 ; D C , 2 ; B D , 3

1. 0 = 1 + 2 + 31. 0 = 3 + 2 - 1 1. 0 = 1 - 2 + 31. 0 = 2 - 1 - 3

Cu 3: Chn phng n ng: Nhng qu trnh c S > 0:1) O2 (k, 250C, 1atm) O2 (k, 250C, 0,1atm)2) NH4Cl(r) NH3(k) + HCl(k)3) CH4(k) +2O2(k) CO2(k) + 2H2O(l)4) N2 (k, 250C, 1atm) N2 (k, 00C, 1atm)5) 2H2(k) + O2(k) 2H2O(k)a) 4,5 b) 1,2c) 3,4,5d) 2,4Cu 5Trong dung dch HNO2 0.1N c 6.5% HNO2 b ion ha. Hng s in li ca HNO2 bng:

1. 4.52 10-41. 4.52 10-21. 4.23 10-4 1. 4.23 10-2

Cu 6: Chn phng n ng:1. H on nhit l h khng trao i cht v cng, song c th trao i nhit vi mi trng.1. H on nhit l h khng trao i cht v nhit, song c th trao i cng vi mi trng.1. H kn l h khng trao i cht v cng, song c th trao i nhit vi mi trng.1. H kn l h khng trao i cht v nhit, song c th trao i cng vi mi trng.Cu 7: Chn phng n sai:1. Mt phn ng thu nhit mnh ch c th xy ra t pht nhit cao nu bin thin entropi ca phn ng dng.1. Mt phn ng thu nhit mnh nhng lm tng entropi c th xy ra t pht nhit thng.1. Mt phn ng hu nh khng thu hay pht nhit nhng lm tng entropi c th xy ra t pht nhit thng.1. Mt phn ng ta nhit mnh c th xy ra t pht nhit thng.

Cu 9: Cho phn ng: CO2(k) + H2(k) CO(k) + H2O(k). Khi phn ng ny t n trng thi cn bng, lng cc cht l: 0.4 mol CO2; 0.4 mol H2; 0.8 mol CO v 0.8 mol H2O trong bnh kn c dung tch l 1 lt. Kc ca phn ng trn c gi tr:a) 8b) 6c) 2d) 4Cu 10: Chn phng n ng: Cho pin nng 250C: . Tnh nng Cu2+ cc in cc khi pin ngng hot ng.1. [Cu2+] = 0.055M c hai in cc1. catod [Cu2+] = 0.065M, anod [Cu2+] = 0.045M1. catod [Cu2+] = 0.045M, anod [Cu2+] = 0.065M1. [Cu2+] = 0.030M c hai in ccCu 11: Chn pht biu sai:1. Entropi ca cc cht tng khi p sut tng1. Entropi ca cc cht tng khi nhit tng1. Phn t cng phc tp th entropi cng ln1. Entropi l thc o xc sut trng thi ca hCu 12: Chn trng hp ng: Cho qu trnh in cc:

Phng trnh Nernst i vi qu trnh cho 250C c dng:

1. 1. 1. 1.

Cu 13:Ho tan 0.585 gam NaCl vo trong nc thnh 1l dung dch. p sut thm thu ca dung dch ny 25oC c gi tr l: (Cho bit MNaCl = 58.5; R = 0.082 lit.atm/mol.K; NaCl trong dung dch c = 1)

1. 0.0205 atm1. 0.041 atm1. 0.488 atm1. 0.244 atm

Cu 14:Ha tan 1 mol KNO3 vo 1 lt nc, nhit ng c ca dung dch thp hn nhit ng c ca nc l 3.01oC cng p sut. Hng s nghim ng ca nc l 1.86 /mol. Vy in ly biu kin ca KNO3 trong dung dch trn l:

1. 5.2%1. 61.8%1. 52.0%1. 6.2%

Cu 15: Chn phng n sai: nhit xc nh, i vi 1mol cht:1) Nhit to thnh ca mi n cht lun bng 0.2) Nhit chy ca mt cht l mt i lng khng i.3) Nhit ha tan ca mt cht l mt i lng khng i.4) Nhit chuyn pha ca mt cht l mt i lng khng i.

1. 1,3,41. Ch 1,31. 2,3,41. 1,2,4

Cu 16: Chn cu ng. Qu trnh ho tan NaCl(r) trong nc xy ra km theo s thay i entropy chuyn pha (Scp) v entropy solvat ha (Ss) nh sau:

1. Scp > 0 , Ss > 01. Scp < 0 , Ss < 01. Scp > 0 , Ss < 0 1. Scp < 0 , Ss > 0

Cu 17: tng tc ca phn ng d pha c s tham gia ca cht rn ta c th dng nhng bin:1) Tng nhit .2) Dng xc tc.3) Tng nng cc cht phn ng.4) Gim nng sn phm phn ng trn b mt cht phn ng rn.5) Nghin nh cc cht phn ng rn.

1. Tt c cc bin php trn. 1. Ch cc bin php 1, 2, 3, 5.1. Ch cc bin php 1, 2, 3, 4.1. Ch cc bin php 1, 2, 3.

Cu 19: Chn phng n ng: Cho phn ng sau 250C:Fe2+(dd) + Ag+(dd) Fe3+(dd) + Ag(r)Bit: s Faraday F = 96484(C); 0(Fe3+/Fe2+) = +0.771V; 0(Ag+/Ag) = 0.7991V. Vi [Fe3+] = 0.1M; [Fe2+] = 0.01M; [Ag+] = 0.01M v Ag kim loi d.1) (Fe3+/Fe2+) = +0.830V 2) (Ag+/Ag) = 0.681V 3) (G298)phn ng = +14.376kJ4) Ti thi im ang xt, phn ng ang din ra theo chiu thun5) Ti thi im ang xt, phn ng ang din ra theo chiu nghch

1. Ch 5 ng1. Ch 4 ng1. 1,2,3,5 ng1. 1,2,4 ng

Cu 20: Chn phng n ng: Tnh th in cc tiu chun ca 250C. Cho bit 250C th in cc tiu chun ca v ln lt bng 1.51V v 1.23V. a) 0.28Vb) 2.41Vc) 2.74Vd) 1.70VCu 21: Chn pht biu sai:1. Hiu ng nhit ca mt phn ng l mt i lng khng i, khng ph thuc vo cch vit phn ng. 1. Hiu ng nhit ca mt phn ng ph thuc vo iu kin (t0, p sut), trng thi cc cht tham gia phn ng cng nh cc sn phm ca phn ng.1. Khng th xc nh c gi tr tuyt i ca entanpi ca h.1. Hiu ng nhit ca mt phn ng o iu kin ng p bng bin thin ca entanpi (), hiu ng nhit ca phn ng o iu kin ng tch bng bin thin ni nng (U) ca h.Cu 22: Tnh nhit to thnh tiu chun ca C4H6O4 tinh th, bit nhit t chy tiu chun (kJ/mol) ca C(gr), H2(k) v C4H6O4 (tinh th) ln lt l 393.51; 285.84 v 1487.00

1. 944.56 kJ/mol1. -807.65 kJ/mol 1. -944.56 kJ/mol1. 807.65 kJ/mol

Cu 23: Xc nh thay i entropi trong qu trnh nn ng nhit thun nghch 10 mol kh metal t 0.1atm n 1atm.

1. 83.1 J/K1. +191.4 J/K1. 191.4 J/K1. +83.1 J/K

Cu 24: Chn phng n ng: Phn ng: 2NO2(k) N2O4(k) c = 4.835kJ.Tnh hng s cn bng KC ca phn ng NO2(k) N2O4(k) 298K. (R = 8.314J/mol.K = 1.987cal/mol.K = 0.082l.atm/mol.K)

1. KC = 7.041. KC = 17442.111. KC = 172.031. KC = 13.11

Cu 26: Chn phng n sai:1) Kh nng in ly ca cht in ly cng yu khi tnh c cc ca dung mi cng ln.2) in ly ca mi dung dch cht in ly mnh lun bng 1 mi nng .3) in ly ca cc hp cht cng ha tr c cc yu v khng phn cc gn bng khng.4) in ly khng ph thuc vo nhit v nng ca cht in ly.

1. Ch 2,41. Ch 1,2,41. Tt c1. Ch 1,3

Cu 27:Cho bit tan trong nc ca Pb(IO3)2 l 4 105 mol/l 250C. Hy tnh tch s tan ca Pb(IO3)2 nhit trn:

1. 2.56 10131. 3.2 1091. 1.6 1091. 6.4 1014

Cu 28: Chn phng n ng: Phn ng 2A + 2B + C D + E c cc c im:* [A], [B] khng i, [C] tng gp i, vn tc v khng i.* [A], [C] khng i, [B] tng gp i, vn tc v tng gp i.* [A], [B] tng gp i, vn tc v tng gp 8 ln.C ba th nghim u cng mt nhit Biu thc ca vn tc theo cc nng A, B, C l:

1. v = k[A]2[B][C]1. v = k[A][B][C]1. v = k[A][B]21. v = k[A]2[B]

Cu 30: Chn phng n ng: Cho cc s liu sau:1) o (Ca2+/Ca) = 2.79 V 2) o (Zn2+/Zn) = 0.764 V3) o (Fe2+/Fe) = 0.437 V4) o (Fe3+/Fe2+) = + 0.771 VCc cht c sp xp theo th t tnh oxy ha gim dn nh sau:

1. Fe2+ < Fe < Zn < Ca 1. Ca2+ < Zn2+ < Fe2+ < Fe3+1. Fe3+ < Fe2+ < Zn2+ < Ca2+1. Ca < Zn < Fe < Fe2+

Cu 31: Chn phng n ng: Cho phn ng oxy ha kh: Cl2 + KOH = KCl + KClO3 + H2OCn bng phn ng trn. Nu h s trc KClO3 l 1 th h s ng trc Cl2 v KOH ln lt l:a) 1,2b) 2,4c) 3,5d) 3,6Cu 33: Chn phng n ng: 1 lt dung dch cha 6g NaCl v 1 lt dung dch cha 20gng C6H12O6. Cho khi lng phn t ca mui v ng ln lt l 58.5 v 180; in ly ca mui =1.0. Dung dch ng c nhit bt u si cao hn.0. Dung dch mui c nhit bt u ng c cao hn0. Dung dch ng c p sut hi bo ha cao hn.0. Dung dch mui c p sut thm thu ln hnCu 34:Trong qu trnh si ca dung dch long cha cht tan khng bay hi, nhit si ca dung dch:1. Tng hoc gim tu bn cht tng cht tan

1. Tng dn1. Gim xung1. Khng i

Cu 35: Chn phng n ng: S cc pin hot ng trn c s cc phn ng oxy ha kh:3Ag+(dd) + Cr (r) = Cr3+(dd) + 3Ag(r)2Fe2+(dd) + Cl2(k) = 2Fe3+(dd) + 2Cl(dd) l:1. (-) Cr Cr3+(dd) Ag+(dd)Ag (+)(-) Pt Cl2(k)Cl(dd) Fe2+(dd), Fe3+(dd)Pt (+)1. (-) AgAg+(dd) Cr3+(dd)Cr (+)(-) Pt Cl2(k)Cl(dd) Fe2+(dd), Fe3+(dd)Pt (+)1. (-) CrCr3+(dd) Ag+(dd)Ag (+)(-) PtFe2+(dd), Fe3+(dd) Cl(dd)Cl2 Pt (+)1. (-) AgAg+(dd) Cr3+(dd)Cr (+)(-) PtFe2+(dd), Fe3+(dd) Cl(dd)Cl2 Pt (+)Cu 36: Cho cc phn ng xy ra iu kin tiu chun: 1) 3O2 (k) 2O3 (k), Ho > 0, phn ng khng xy ra t pht mi nhit .2) C4H8(k) + 6O2(k) 4CO2(k) + 4H2O(k), H0 < 0, phn ng xy ra t pht mi nhit .3) CaCO3(r) CaO(r) + CO2(k), H0 > 0, phn ng xy ra t pht nhit cao.4) SO2(k) + O2(k) SO3(k), H0 < 0, phn ng xy ra t pht nhit thp.

1. Ch 1,3 ng1. Tt c cng ng1. Ch 1,3,4 ng1. Ch 2,4 ng

Cu 37: Tnh nng Pb2+ bo ha trong dung dch KI 0.1M. Bit tch s tan ca PbI2 bng 1.4 10-8

1. 1.4 10-6 M1. 1.4 10-5 M1. 1.2 10-4 M1. 2.4 10-3 M

Cu 38: Chn phng n ng: 1) Nng phn trm cho bit t s gia s gam ca mt cht trn tng s gam ca cc cht to thnh dung dch.2) Nng ng lng gam c biu din bng s mol cht tan trong 1 lt dung dch.3) Nng mol cho bit s mol cht tan trong 1000g dung mi nguyn cht.4) Cn bit khi lng ring ca dung dch khi chuyn nng molan thnh nng phn t gam hoc nng ng lng gam.5) Khi lng ring ca mt cht l khi lng (tnh bng gam) ca 1 cm3 cht .

1. 1, 4, 5 ng1. 1, 2, 3 ng1. 3, 5 ng1. 4, 5 ng

Cu 40: 100oC, mt phn ng kt thc sau 3 gi. H s nhit ca phn ng l 2. Khi tng nhit phn ng ln 120oC th thi gian phn ng s l:

1. 20 pht.1. 45 pht.1. 1 gi 30 pht.1. 6 gi.

Cu 41: Tc ng no s lm tng hiu sut phn ng: CaCO3(r) CaO(r) + CO2(k), > 0

1. Gim nhit 1. Tng p sut 1. Tng nhit 1. Tng nng CO2

Cu 42: Thng s no sau y c thuc tnh cng :

1. p sut (P) 1. Entanpy (H) 1. Ni nng (U) 1. Th ng p (G)

Cu 45: Chn phng n ng: Cc phn ng no di y c th xy ra iu kin tiu chun:1) 2MnCl2(dd) + 2Cl2(k) + 8H2O = 2HMnO4(dd) + 14HCl(dd) 2) 3Cl2(k) + 2CrCl3(dd) + 2KCl(dd) + 7H2O = K2Cr2O7(dd) + 14HCl(dd) 3) MnO2(r) + 4HCl(dd) = MnCl2(dd) + Cl2(k) + 2H2OCho cc th kh tiu chun: + 8H+ + 5e- = Mn2+ + 4H2O 0 = 1.51 VCl2(k) + 2e- = 2Cl0 = 1.359 V + 14H+ + 6e- = 2Cr3+ + 7H2O 0 = 1.33 VMnO2(r) + 4H+ + 2e- = Mn2+ + 2H2O 0 = 1.23 V

1. C 3 phn ng u xy ra1. Ch phn ng 2 xy ra1. Khng phn ng no xy ra c1. Ch 2, 3 xy ra

Cu 46: Chn phng n ng: Tnh So (J/K) 25oC ca phn ng: SO2 (k) + O2 (k) = SO3 (k)Cho entropi tiu chun 25oC ca SO2(k); O2(k) v SO3(k) ln lt bng: 248; 205 v 257 (J/mol.K)

1. 93,51. 93,51. 1961. 196

Cu 47:Hy d on trt t sp xp theo chiu pH tng dn ca cc dung dch acid: HCl 0.2M (1); HCl 0.1M (2); H2SO4 0.1M (3); H3PO4 0.1M (4)

1. (1) < (2) = (3) < (4)1. (4) < (1) < (3) < (2)1. (4) < (1) = (3) < (2)1. (1) < (3) < (2) < (4)

Cu 49: Chn phng n ng: Cho cc phn ng sau:CaSiO3(r) = CaO(r) + SiO2(r) H0 0 (1)MgCO3(r) = CO2(k) + MgO(r) H0 0 (2)I2(k) + H2(k) = 2HI(k) H0 0(3)Phn ng c th xy ra vi hiu sut cao nhit cao:a) Ch 2b) Ch 1c) 1,2 d) Ch 3Cu 50: Cho v . Tnh hng s cn bng 25oC ca phn ng 2Fe3+(dd) + Sn2+(dd) 2Fe2+(dd) + Sn4+(dd)a) 1018b) 1027 c) 1021d) 1014Cu 51: i vi phn ng mt chiu, tc phn ng s: 1. Gim dn theo thi gian cho n khi bng khng.1. Gim dn theo thi gian cho n khi bng mt hng s khc khng.1. Tng dn theo thi gian.1. Khng i theo thi gian.Cu 52: Chn cu ng: Trong phn ng 3Br2 + I + 6OH = 6Br + + 3H2O1. Cht oxy ha l Br2, cht b oxy ha l I1. Cht b oxy ha l Br2, cht b kh l I1. Br2 b kh, I l cht oxy ha.1. Cht kh l Br2, cht oxy ha l I .Cu 53: Chn phng n ng: Th ca in cc km thay i nh th no khi pha long dung dch mui Zn2+ ca in cc xung 10 ln:

1. gim 59 mV 1. Tng 29.5 mV 1. gim 29.5 mV 1. tng 59 mV

Cu 54: Khi c mt cht xc tc, Ho ca phn ng:1. Thay i v cht xc tc tham gia vo qu trnh phn ng.1. Thay i v cht xc tc lm gim nhit cn c phn ng xy ra.1. Thay i v cht xc tc lm gim nng lng hot ha ca phn ng.1. Khng thay i v cht xc tc ch tham gia vo giai on trung gian ca phn ng v c phc hi sau phn ng. Sn phm v tc cht vn ging nh khi khng c cht xc tc.Cu 55:Trong cng iu kin ng p, ng nhit, cc phn ng no di y sinh cng dn n:1) H2SO4(dd) + Na2CO3(r) Na2SO4(dd) + CO2(k) + H2O(l) 2) H2O(k) +C(r) H2(k) + CO(k) 3) N2(k) + 3H2(k) 2NH3(k) 4)Fe2O3(r) +3CO(k) 2Fe(r) + 3CO2(k) 5) 2SO2(k) + O2(k) 2SO3(k)

1. Tt c cng ng1. Ch 1,2 ng1. Ch 4 ng1. Ch 3,5 ng

Cu 57: Chn phng n ng: Mt phn ng t xy ra c G0 < 0. Gi thit rng bin thin entanpi v bin thin entropi khng ph thuc nhit , khi tng nhit th hng s cn bng Kp s:

1. khng i1. cha th kt lun c1. gim1. tng

Cu 58: Chn phng n ng: 1) p sut thm thu ca dung dch lng long phn t c ln bng p sut gy ra bi cht tan nu cht ny th kh l tng, chim th tch bng th tch ca dung dch v cng nhit vi nhit ca dung dch.2) p sut thm thu t l thun vi nhit ca dung dch.3) p sut thm thu ca mi dung dch c cng nng mol v cng nhit l bng nhau.4) nh lut Vant Hoff (v p sut thm thu) ng cho mi dung dch.5) p sut thm thu tnh theo nng ng lng gam ca dung dch.

1. Ch 4, 5 ng1. Ch 1, 2 ng1. Ch 1, 3, 5 ng1. Tt c cng ng

Cu 59: Chn phng n sai:1. Phn ng ta nhiu nhit thng c kh nng xy ra nhit thng. 1. Phn ng c Go < 0 c th xy ra t pht.1. Phn ng c cc bin thin entanpi v entropi u dng c kh nng xy ra nhit cao.1. Phn ng c Go > 0 khng th xy ra t pht bt k iu kin no.Cu 60: Chn phng n ng: Nguyn nhn chnh lm cho tc phn ng tng ln khi tng nhit l:1. Lm tng entropi ca h.1. Tn sut va chm gia cc tiu phn tng.1. Lm gim nng lng hot ha ca phn ng. 1. Lm tng s va chm ca cc tiu phn c nng lng ln hn nng lng hot ha.--- Ht ---

On Tap Cac Đề Thi Cuoi Ki Hdc a 2015

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