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Explain chlor-alkali process with chemical equation. Name the products formed at anode and cathode.
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• When electricity is passed through brine, it decomposes to form sodium hydroxide (alkali) and chlorine, hence this process is called chlor-alkali process. (1 Mark)
$\ce{2NaCl(aq) + 2H2O(l) ->[Electricity] 2NaOH(aq) + H2(g) + Cl2(g)}$ (1 Mark)
• At anode: $\ce{Cl2}$ (
frac{1}{2} Mark)
• At cathode: $\ce{H2}$ (
frac{1}{2} Mark)
$\ce{2NaCl(aq) + 2H2O(l) ->[Electricity] 2NaOH(aq) + H2(g) + Cl2(g)}$ (1 Mark)
• At anode: $\ce{Cl2}$ (
frac{1}{2} Mark)
• At cathode: $\ce{H2}$ (
frac{1}{2} Mark)