Write the anode and cathode reactions and the overall cell reaction occurring in a lead storage battery during its use.
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Solution and Explanation
- Anode reaction: \[ \text{Pb} (s) + \text{H}_2\text{SO}_4 (aq) \rightarrow \text{PbSO}_4 (s) + 2\text{e}^- \]
- Cathode reaction: \[ \text{PbO}_2 (s) + 4\text{H}^+ (aq) + 2\text{e}^- \rightarrow \text{PbSO}_4 (s) + 2\text{H}_2\text{O} (l) \]
- Overall reaction: \[ \text{Pb} (s) + \text{PbO}_2 (s) + 2\text{H}_2\text{SO}_4 (aq) \rightarrow 2\text{PbSO}_4 (s) + 2\text{H}_2\text{O} (l) \]
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