lose electrons → oxidation → anode
gain electrons → reduction → cathode
O2(g)+ 4 H+(aq)+2 Zn(s)→2 H2O(l)+2 Zn2+(aq)
Analyze the change in charge of each element:
O2(g) → 2 H2O(l)
Indicate the half-reaction occurring at Cathode.
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