
REDOKS DAN ELEKTROKIMIA
Authored by Diana Ardianti
Chemistry
12th Grade
Used 141+ times

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30 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pada reaksi :
Cl2 (aq) + 2 KOH (aq) → KCl (aq) + KClO (aq) + H2O
bilangan oksidasi klor berubah dari ….
-1 menjadi + 1 dan 0
+1 menjadi –1 dan 0
0 menjadi –1 dan –2
-2 menjadi 0 dan 1
0 menjadi –1 dan +1
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Diketahui persamaan reaksi redoks berikut:
Zn(s) + 2MnO2(s) + 2NH4+ (aq) → Zn+2(aq) + Mn2O3(s) + 2NH3(g) + H2O(l)
Perubahan bilangan oksidasi Mn pada reaksi redoks tersebut adalah….
+1 menjadi +2
+2 menjadi +3
+2 menjadi +4
+4 menjadi +2
+4 menjadi +3
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Persamaan reaksi berikut yang merupakan reaksi redoks adalah….
HCl + NaOH ↔ NaCl + H2O
Ca2+ + O-2 ↔ CaO
Zn + FeCl2 ↔ ZnCl2 + Fe
KOH ↔ K+ + OH-
CH3COOH + NH4OH ↔ CH3COONH4 + H2O
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Di antara reaksi di bawah ini, manakah yang merupakan reaksi redoks .…
NaCl (aq) + H2O (/)→ NaOH (aq) + HCl (aq)
CaSO4 (aq) + 2 NaOH (aq) → Na2SO4 (aq) + Ca(OH)2 (s)
BaCl2 (aq) + H2SO4 (aq) → BaSO4 (s) + 2HCI (aq)
MnO2 (s) + 4 HC1 (aq) → MnCI2 (aq) + 2 H2O (l) + Cl2 (g)
CaCO3 (s) + 2HCI (aq) → CaCI2 (aq) + H20 (/) + CO2 (g)
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Pada klor dapat dibuat melalui reaksi
redoks berikut :
a K2Cr2O7 (aq) + 14 HCl (aq) → 2 KCl (aq) + b CrCl3 (aq) +
c Cl2 (aq) + d H2O(l)
Setelah disetarakan, nilai koefisien reaksi
a, b, c, dan d berturut-turut adalah….
A. 1, 2, 2, 7
B. 1, 2, 3, 7
C. 1, 2, 1, 7
D. 2, 1, 2, 7
E. 2, 2, 3, 7
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Persamaan reaksi redoks :
a Cl2 + b OH- → c Cl¯ + ClO3 - + d H2O
Harga koefisien a, b, c, dan d adalah ….
3, 6, 5, dan 3
3, 5, 6, dan 3
3, 6, 5, dan 2
3, 6, 5, dan 1
3, 5, 6, dan 2
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Perhatikan data persamaan reaksi berikut ini:
Fe+2(aq) + 2e → Fe(s) E° = - 0,409 volt
Cu+2(aq) + 2e → Cu(s) E° = + 0,34 volt
Notasi sel untuk reaksi tersebut adalah….
Fe / Fe+2 // Cu / Cu+2
Cu+2 / Cu // Fe+2 / Fe
Cu / Cu+2 // Fe+2 / Fe
Fe / Fe+2 // Cu+2 / Cu
Fe+2 / Fe // Cu+2 / Cu
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