Which Is the Half-Reaction at the Cathode in a Lead

question 9

Multiple Choice

Which is the half-reaction at the cathode in a lead storage battery?

• A)Pb(s)+ PbO₂(s) + 4H⁺(aq) + 2SO₄^2-(aq) → 2PbSO₄(s) + 2H₂O(l)
• B)PbO₂(s) + 4H⁺(aq) + 2SO₄²⁻(aq) + 2e⁻ → PbSO₄(s) + 2H₂O(l)
• C)Pb(s) + SO₄²⁻(aq) → PbSO₄(s) + 2e⁻
• D)Pb(s) → Pb(s) + 2e⁻
• E)H₂(g) → 2H⁺(aq) + 2e⁻

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