During recharge, the reaction at the cathode is
A - VCE - SSCE Chemistry - Question 12 - 2021 - Paper 1
Question 12
During recharge, the reaction at the cathode is
A. Pb(s) + SO₄²⁻(aq) → PbSO₄(s) + 2e⁻
B. PbSO₄(s) + 2e⁻ → Pb(s) + SO₄²⁻(aq)
C. PbSO₄(s) + SO₄²⁻(aq) + 4H⁺ + 2e⁻ → PbS... show full transcript
Worked Solution & Example Answer:During recharge, the reaction at the cathode is
A - VCE - SSCE Chemistry - Question 12 - 2021 - Paper 1
Step 1
Identify the reaction at the cathode
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Answer
The cathode reaction during the recharge of the lead-acid battery involves the conversion of lead sulfate (PbSO₄) back to lead (Pb) and the sulfate ion (SO₄²⁻). This happens while reducing ions at the cathode.
Step 2
Choose the correct option
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Answer
The correct option is B: PbSO₄(s) + 2e⁻ → Pb(s) + SO₄²⁻(aq). This option correctly identifies the reduction process happening at the cathode.
