Explain the Chlor-alkali process.

When electricity is passed through an aqueous solution of sodium chloride it decomposes to form sodium hydroxide. The process is called the chlor-alkali alkali process.

An aqueous solution of sodium chloride is called brine.

2NaCl (aq) + 2H2O(l) (electrolysis) → 2NaOH(aq) + Cl2(g) + H2(g).

Chlorine gas is given off at anode and hydrogen gas at cathode.

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