SEL ELEKTROKIMIA
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Medium
siti mulyani
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20 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Pada persamaan reaksi Fe +H2SO4 → FeSO4 + H2.
Ar Fe adalah 56 maka massa ekivalen Fe adalah …
112
56
28
14
224
2.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Sejumlah arus mengendapkan 18 gram perak dari larutan AgNO3, dan mengendapkan 5 gram logam M dari larutan M(SO4)2. Jika Ar perak 108 maka Ar Logam M adalah …
30
36
45
48
60
3.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Pada proses elektrolisis larutan NaOH dengan elektrode Pt, reaksi kimia yang terjadi pada katode adalah …
Na+ + e → Na
4OH- → 2H2O + O2 + 4e
2H2O + 2e → H2 + 2OH-
2H+ + 2e → H2
2H2O → 4H+ + O2 + 4e
4.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Bila kedalam larutan NiSO4 dialirkan listrik sebesar 0.1 F, dan Ar Ni = 59, maka dikatode akan didapat logam Ni seberat …
59,00 gram
29,50 gram
14,75 gram
5,95 gram
2,95 gram
5.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Berapa faraday yang diperlukan untuk mereduksi 60 gram ion kalsium menjadi logam kalsium …. (Ar = Ca = 40)
1,0
1,5
2,0
3,0
4,0
6.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Pada elektrolisis larutan CuSO4 dengan elektrode Pt, dialirkan arus listrik 2 Ampere selama 965 detik (Ar Cu=63,5) maka banyaknya logam tembaga yang dihasilkan …
317,5 mg
625,0 mg
952,5 mg
1270 mg
1905 mg
7.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Pada elektrolisis cairan MgCl2, pada katode dan anode berturut dibebaskan …
H2 dan Cl2
H2 dan O2
Mg dan Cl2
Mg dan H2
Mg dan O2
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