
Redoks dan Elektrokimia
Authored by san san
Chemistry
12th Grade
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12 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 3 pts
Bilangan oksidasi Mn pada senyawa MnO2 adalah ....
+2
+3
+4
+5
+7
2.
MULTIPLE CHOICE QUESTION
10 mins • 15 pts
Diketahui reaksi :
a Zn + b NO3- → c Zn2+ + NH4+
Jika reaksi diatas disetarakan makan koefisien a, b, dan c berturut-turut adalah . . ..
4, 1
4, 2
4, 3
4, 4
4, 5
3.
MULTIPLE CHOICE QUESTION
10 mins • 15 pts
Diketahui reaksi :
a Cl2 + b IO3- → c Cl- + IO4-
Jika reaksi tersebut disetarakan maka nilai koefisien a, b dan c adalah . . ..
1, 1, 2
1, 2, 1
1, 1, 1
1, 2, 2
2, 1, 1
4.
MULTIPLE CHOICE QUESTION
1 min • 4 pts
Bilangan oksidasi N = -2 terdapat pada senyawa . . . .
KNO3
N2O5
NO
N2O3
N2H4
5.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Diketahui :
Cu2+(aq) + 2e- → Cu(s) E0 = + 0,34 V
Zn2+(aq) + 2e- → Zn(s) E0 = - 0,76 V
Bila kedua logam tersebut dipasangkan untuk membentuk sel volta, maka pernyataan berikut yang benar adalah ....
Elektrode Zn teroksidasi dan Elektrode Cu tereduksi
Dalam sistem sel volta tersebut elektron bergerak dari Zn menuju Cu
Potensial sel yang dihasilkan adalah -1,10 volt
Elektroda Zn Sebagai Katoda dan Cu sebagai Anoda
Notasi selnya : Zn(s)|Zn2+(aq)||Cu2+(aq)|Cu E°sel = -1,10 V
6.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Bahan yang digunakan sebagai elektrode pada sel aki (accu) adalah ....
C
Zn
Pb dan PbO2
Zn dan Cu
Cu dan PbO2
7.
MULTIPLE CHOICE QUESTION
3 mins • 3 pts
Logam yang tidak diperoleh dengan proses elektrolisis adalah ....
Natrium
Tembaga
Magnesium
Kalsium
Hydrargyrum
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