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Example of redox reaction occur on both voltaic cell and electrolytic cell. (please provide the example of the reaction with half-cell reaction and the overall reaction)
Accepted Answer
Voltaic Cell
Half-cell reactions:
Anode: Zn(s) → Zn2+(aq) + 2 e-
Cathode: Cu2+(aq) + 2 e- → Cu(s)
Overall reaction:
Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
Electrolytic Cell
Half-cell reactions:
Anode: H2O(l) → O2(g) + 4 H+(aq) + 4 e-
Cathode: 2 H+(aq) + 2 e- → H2(g)
Overall reaction:
2 H2O(l) → 2 H2(g) + O2(g)
Half-cell reactions:
Anode: Zn(s) → Zn2+(aq) + 2 e-
Cathode: Cu2+(aq) + 2 e- → Cu(s)
Overall reaction:
Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
Electrolytic Cell
Half-cell reactions:
Anode: H2O(l) → O2(g) + 4 H+(aq) + 4 e-
Cathode: 2 H+(aq) + 2 e- → H2(g)
Overall reaction:
2 H2O(l) → 2 H2(g) + O2(g)
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