Quiz Elektrokimia
Quiz
•
Chemistry
•
12th Grade
•
Hard
Eva Purba
Used 4+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Diketahui potensial reduksi standar sebagai berikut:
Fe2+ | Fe Eo = −0,41 V
Zn2+ | Zn Eo = −0,76 V
Cu2+ | Cu Eo = +0,34 V
Ag+ | Ag Eo = +0,80 V
Reaksi yang tidak dapat berlangsung spontan adalah
Fe | Fe2+ || Zn2+| Zn
Fe | Fe2+ || Cu2+ | Cu
Fe | Fe2+ || Ag+ | Ag
Zn | Zn2+ || Cu2+ | Cu
2.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Diketahui:
Ni2+ + 2e → Ni E° = - 0,25 volt
Pb2+ + 2e → Pb E° = - 0,13 volt
Potensial standar sel volta yang terdiri dari elektroda Ni dan Pb adalah….
– 0,38 volt
+0,12 volt
+0,38 volt
– 0, 12 volt
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Didalam elektrolisis digunakan 2 buah elektroda yang bermuatan, pernyataan ini yang benar adalah
katoda bermuatan positif dan anoda bermuatan netral
katoda bermuatan negatif dan anoda bermuatan positif
katoda bermuatan positif dan anoda bermuatan negatif
katoda bermuatan netral dan anoda bermuatan negatif
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Pada elektrolisis larutan tembaga (II) sulfat dengan elektrode perak , di anode terjadi reaksi
2H2O + 2e → 2OH– + H2
H2 → 2H+ + 2e
Ag → Ag+ + e
2H2O → 4H+ + O2 + 4e
5.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Perhatikan peristiwa elektrolisis berikut!
(1) Lelehan NaBr dengan elektrode platina
(2) Larutan K2SO4 dengan elektrode karbon
(3) Lelehan KCl dengan elektrode platina
(4) Larutan CuSO4 dengan elektrode karbon
Pasangan reaksi di anoda yang menghasilkan gas O2 terjadi pada nomor
(1) dan (2)
(2) dan (3)
(3) dan (4)
(2) dan (4)
6.
MULTIPLE CHOICE QUESTION
2 mins • 5 pts
Perhatikan gambar sel volta berikut :
Jika,
E0 Ni = -0,25 Volt
E0 Ag = +0,80 Volt,
maka notasi sel volta yang benar dari gambar di atas adalah ….
2 Ag | 2 Ag+ || Ni2+ | Ni
2 Ag | 2 Ag || Ni2+ | Ni
Ni | Ni2+ || Ag | Ag+
Ni | Ni2+ || 2 Ag | 2 Ag+
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
Salah satu aplikasi penerapan sel elektrolisis adalah elektroplating jika seorang siswa ingin melapisi gelang dengan perak pernyataan di bawah yang tepat adalah
gelang diletakkan pada elektrode anode
menggunakan larutan tembaga sulfat
menggunakan elektrode karbon
logam perak diletakkan elektrode anode
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