Question

Write the preparation of the following compound with balanced chemical equation:

NaOH by chlor-alkali process

Answer 1

Sodium hydroxide (NaOH) is produced via the chlor-alkali process by electrolyzing a concentrated aqueous solution of sodium chloride (brine). Electricity splits the brine into sodium hydroxide, chlorine gas (Cl₂) at the anode, and hydrogen gas (H₂) at the cathode.

\[\ce{2NaCl_{(aq)} + 2H2O_{(l)} ->[electrolysis] 2NaOH_{(aq)} + Cl2_{(g)}\uparrow + H2_{(g)}\uparrow}\]