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Authored by Luh Ade Widiandari
Chemistry
11th - 12th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Elektrolisis larutan AgNO3 selama 1 jam dengan kuat arus 2 ampere akan mengendapkan perak sebanyak? (Ar Ag = 108)
7,9 gram
8,06 gram
81,9 gram
108 gram
819 gram
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Kuat arus listrik sebesar 10 ampere dipakai untuk melapisi logam seng dengan 0,59 gram tembaga yang berasal dari larutan tembaga sulfat (Ar Cu = 63,5). Waktu yang diperlukan untuk melapisi logam seng itu adalah ...
0,5 jam
0,25 jam
0,025 jam
0,05 jam
0,005 jam
3.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Larutan ZnSO4 dielektrolisis dengan arus listrik 0,1 F selama 2 jam. Endapan Zn pada katoda adalah (Ar Zn = 65) ...
0,05 mol
0,10 mol
0,20 mol
3,27 mol
6,25 mol
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Berapa faraday yang diperlukan untuk mereduksi 60 gram ion kalsium menjadi logam kalsium (Ar Ca=40) ?
1
2
4
1,5
3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada elektrolisis larutan CuSO4 dengan elektoda Pt, dihasilkan endapan Cu sebanyak 6,35 gram, jika arus yang digunakan adalah 2 ampere, maka waktu yang diperlukan untuk elektrolisis adalah ….(Ar Cu=63,5; S=32; O=16
193 s
965 s
9650 s
1935 s
19350 s
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pada elektrolisis larutan ZnSO4 terjadi reduksi Zn2+ menjadi Zn. Massa ekivalen dari Zn adalah....(Ar Zn = 65)
7,5
13
15
32,5
65
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Berapa waktu yang diperlukan untuk mengendapkan 5 gram seng di katoda jika ke dalam sel yang berisi larutan seng sulfat dialirkan arus listrik sebesar 10 ampere? (Ar Zn = 65)
5 menit
10 menit
25 menit
27 menit
49 menit
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