(a.)Write the anode and cathode reactions and the overall cell reaction occurring in a lead storage battery during its use.
(a.)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
In a lead storage battery (also known as a lead-acid battery), during discharge: - 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: \[ \text{Pb} (s) + \text{PbO}_2 (s) + 2\text{H}_2\text{SO}_4 (aq) \rightarrow 2\text{PbSO}_4 (s) + 2\text{H}_2\text{O} (l) \]
Top Questions on Electrochemistry
Standard electrode potential for \( \text{Sn}^{4+}/\text{Sn}^{2+} \) couple is +0.15 V and that for the \( \text{Cr}^{3+}/\text{Cr} \) couple is -0.74 V. The two couples in their standard states are connected to make a cell. The cell potential will be:
To calculate the cell potential (\( E^\circ_{\text{cell}} \)), we use the standard electrode potentials of the given redox couples.
Given data:
\( E^\circ_{\text{Sn}^{4+}/\text{Sn}^{2+}} = +0.15V \)
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