What Reaction Occurs at the Anode During the Electrolysis of Aqueous

question 72

Multiple Choice

What reaction occurs at the anode during the electrolysis of aqueous CuSO₄?
Reduction Half-Reaction
E° (V)
2H₂O(l) + 2e^- H₂(g) + 2OH^-(aq) -0.83
2H⁺(aq) + 2e^- H₂(g) 0.00
Cu²⁺(aq) + 2e^- Cu(s) 0.34
O₂(g) + 4H⁺(aq) + 4e^- 2H₂O(l) 1.23

• A)2H₂O(l)→ O₂(g)+ 4H⁺(aq)+ 4e^-
• B)Cu(s)→ Cu²⁺(aq)+ 2e^-
• C)2H₂O(l)+ 2e^- → H₂(g)+ 2OH^-(aq)
• D)Cu²⁺(aq)+ 2e^- → Cu(s)
• E)2H⁺(aq)+ 2e^- → H₂(g)

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