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For the electrolysis of concentrated aqueous sodium chloride, which half-equation is correct at the anode?.
- A.2H⁺(aq) + 2e⁻ → H₂(g)
- B.2Cl⁻(aq) → Cl₂(g) + 2e⁻
- C.4OH⁻(aq) → O₂(g) + 2H₂O(l) + 4e⁻
- D.Na⁺(aq) + e⁻ → Na(s)
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