9.4 Voltaic Cells How a Voltaic Cell Works Step 1 Electrons are produced at the zinc strip according to the oxidation half-reaction: Zn(s) → Zn 2+ (aq) + 2e – Anode (–) Cathode (+) Salt bridge Cotton plugs ZnSO 4 solution CuSO 2 solution Zn(s) Zn 2+ (aq) + 2e – Cu 2+ (aq) + 2e – Cu(s) Wiree–e– e–e–
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