SSCE VCE Chemistry Redox Reactions: The reaction which occurs at the

The reaction which occurs at the anode when the battery is recharging is A - VCE - SSCE Chemistry - Question 15 - 2011 - Paper 1

Question 15

The reaction which occurs at the anode when the battery is recharging is A. PbSO₄(s) + 2e⁻ → Pb(s) + SO₄²⁻(aq) B. Pb(s) + SO₄²⁻(aq) → PbSO₄(s) + 2e⁻ C. PbSO₄(s) +... show full transcript

Worked Solution & Example Answer:The reaction which occurs at the anode when the battery is recharging is A - VCE - SSCE Chemistry - Question 15 - 2011 - Paper 1

Step 1

C. PbSO₄(s) + 2H₂O(l) → PbO₂(s) + 4H⁺(aq) + SO₄²⁻(aq) + 2e⁻

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Answer

When a lead-acid battery is recharging, the reaction at the anode involves the conversion of lead sulfate ( ext{PbSO}_4) into lead dioxide ( ext{PbO}_2). The process requires the addition of water and results in the release of sulfate ions and protons. The overall reaction can be represented as follows:

$ext{PbSO}_4(s) + 2 ext{H}_2 ext{O}(l) → ext{PbO}_2(s) + 4 ext{H}^+(aq) + ext{SO}_4^{2-}(aq) + 2e^-$

This indicates that as the battery charges, electrons are released and the state of the anode changes.

The reaction which occurs at the anode when the battery is recharging is A - VCE - SSCE Chemistry - Question 15 - 2011 - Paper 1

Worked Solution & Example Answer:The reaction which occurs at the anode when the battery is recharging is A - VCE - SSCE Chemistry - Question 15 - 2011 - Paper 1

C. PbSO₄(s) + 2H₂O(l) → PbO₂(s) + 4H⁺(aq) + SO₄²⁻(aq) + 2e⁻

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