
UH 2 : Redoks dan Elektrokimia
Authored by Nanat Ma'ruf
Chemistry
12th Grade
Used 3+ times

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7 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 6 pts
Bilangan oksidasi unsur C dalam H2C2O4 adalah ...
+2
+3
+4
+5
+6
2.
MULTIPLE CHOICE QUESTION
5 mins • 6 pts
Reaksi oksidasi berikut yang perubahan biloksnya sebanyak 2 satuan …
Cl2 → Cl–
IO2– → IO3–
Al → Al3+
Fe2+ → Fe3+
NO → NO3–
3.
MULTIPLE CHOICE QUESTION
5 mins • 6 pts
Jumlah elektron yang dibutuhkan untuk mereduksi satu ion MnO4– menjadi Mn2+ adalah ...
1 elektron
3 elektron
5 elektron
7 elektron
9 elektron
4.
MULTIPLE CHOICE QUESTION
5 mins • 6 pts
Perhatikan persamaan reaksi ion:
aCrO42– + bSO32– + cH+ → dCr+3 + 3SO42– + 5H2O
Nilai a, b, c, dan d berturut-turut adalah …
2, 3, 10, dan 5
3, 2, 10, dan 3
2, 3, 10, dan 2
3, 2, 5, dan 3
5, 3, 2, dan 10
5.
MULTIPLE CHOICE QUESTION
5 mins • 6 pts
Diketahui data potensial reduksi sebagai berikut.
Reaksi berikut yang berlangsung spontan adalah …
Fe + Pb2+ → Fe2+ + Pb
Cu + Pb2+ → Cu2+ + Pb
Ag + Cu2+ → Ag+ + Cu
Cu + Fe2+ → Cu2+ + Fe
Ag + Pb2+ → Ag2+ + Pb
6.
MULTIPLE CHOICE QUESTION
5 mins • 6 pts
Jika diketahui:
Mg2+ + 2e → Mg Eo = – 2,38 volt
Ni2+ + 2e → Ni Eo = - 0,23 volt
Jika suatu sel volta dirangkai menggunakan bahan-bahan tersebut, maka besarnya E0sel adalah …
– 2,61 volt
– 2,05 volt
+ 2,61 volt
+ 2,05 volt
+ 1,10 volt
7.
MULTIPLE CHOICE QUESTION
5 mins • 6 pts
Diketahui potensial elektroda standar sebagai berikut:
Fe2+ + 2e → Fe Eo = - 0,44 Volt
Sn2+ + 2e → Sn Eo = - 0,14 Volt
Cu2+ + 2e → Cu Eo = + 0,34 Volt
Ag+ + e → Ag Eo = + 0,80 Volt
Dari data di atas harga Eo sel terbesar dimiliki oleh pasangan sel …
Fe ∣ Fe2+ ∣∣ Sn2+ ∣ Sn
Cu ∣ Cu2+ ∣∣ Ag+ ∣ Ag
Fe ∣ Fe2+ ∣∣ Ag+ ∣ Ag
Sn ∣ Sn2+ ∣∣ Cu2+ ∣ Cu
Sn ∣ Sn2+ ∣∣ Ag+ ∣ Ag
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