The electrolysis of sodium chloride solution
1 mark · EasyWhat is the symbol equation for the reduction of hydrogen ions at the cathode during electrolysis of sodium chloride solution?
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2H^+ (aq) + 2e^- → H_2 (g)
Also accept: 2H+ (aq) + 2e- → H2(g); 2H⁺(aq) + 2e⁻ → H₂(g)
Common mistakes: Unbalanced equation; Forgetting 'aq' for ions
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A1 · 1 mark · Correctly gives: 2H^+ (aq) + 2e^- → H_2 (g) (or equivalent).
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