redoks elektrokimia XII
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
Bilangan oksidasi dari unsur Cr pada senyawa K2Cr2O7 adalah ...
+7
+2
+6
+1
+3
2.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
Reaksi berikut yang merupakan reaksi redoks adalah.....
AgNO3 + NaCl → AgCl + NaNO3
Cl2 + SO2 + 2H2O → 2HCl + H2SO4
MgO + 2H+ → Mg2+ + H2O
CuO + 2H+ → Cu2+ + H2O
SO3 + 2KOH → K2SO4 + H2O
3.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
Fungsi jembatan garam dalam sel volta adalah...
Menambah muatan positif
Menambah muatan negatif
Menjaga keseimbangan kation dan anion
Mengurangi muatan positif
Mengurangi muatan negatif
4.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
Pada sel volta dengan elektrode Pb dan Ni, aliran elektron bergerak....
Dari Pb ke Pb2+
Dari Pb ke Ni
Dari Ni ke Ni2+
Dari Ni ke Pb
Dari Ni2+ke Pb2+
5.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
Sel elektrokimia:
Penulisan lambang sel yang tepat dari gambar sel tersebut adalah ........
Cu(s) | Cu2+(aq) || Zn(s) | Zn2+(aq)
Zn(s) | Zn2+(aq) || Cu2+(aq) | Cu(s)
Cu2+(s) | Cu(s) || Zn2+(aq) | Zn(s)
Zn2+(aq) | Zn(s) || Cu(s) | Cu2+(aq)
Zn(s) | Zn2+(aq) || Cu(s) | Cu2+(aq)
6.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
Diketahui potensial elektrode:
Cu2+ │Cu = + 0,34 Volt
Zn2+ │Zn = - 0,74 Volt
Pernyataan dibawah ini yang tidak benar adalah....
Elektrode Cu bertindak sebagai katode
Elektrode Zn bertindak sebagai anode
Potensial standar sel adalah +2,10 volt
Reaksi selnya adalah
Zn + Cu2+→ Zn2++Cu
Elektron mengalir dari elektrode Zn ke Cu
7.
MULTIPLE CHOICE QUESTION
30 sec • 4 pts
Bahan yang digunakan sebagai elektrode pada sel aki adalah...
Pt dan C
Zn dan Cu
Zn dan C
Cu dan PbO2
Pb dan PbO2
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