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The anode half-reaction occurring during the discharge of a lead storage battery is

Question

The anode half-reaction occurring during the discharge of a lead storage battery is

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Solution

The anode half-reaction occurring during the discharge of a lead storage battery is:

Pb(s) + HSO4−(aq) → PbSO4(s) + H+(aq) + 2e−

Here's the step by step process:

  1. The lead (Pb) at the anode reacts with the sulfate ion (HSO4-) present in the electrolyte (sulfuric acid).

  2. This reaction forms lead sulfate (PbSO4), which gets deposited on the anode.

  3. Hydrogen ions (H+) are also produced in this reaction.

  4. The lead (Pb) loses two electrons (2e-) in this process, which is why it's an oxidation reaction (since oxidation involves loss of electrons). These electrons move through the external circuit to the cathode, producing an electric current.

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