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chemistry igcse acapprinted 26 · PDF 26
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At Cathode: Copper ions (Cu²⁺) are reduced to copper metal. Half-equation: Cu²⁺ + 2e⁻ → Cu(s) At Anode: Hydroxide ions (OH⁻) are oxidized to form oxygen gas. Half-equation: 4OH⁻ → O₂(g) + 2H₂O + 4e⁻ Products: Copper metal at cathode, oxygen gas at anode.