Hypochlorous acid (HClO) solution is produced by electrolyzing a diluted hydrochloric acid solution at a specific concentration. This method utilizes low-cost diluted hydrochloric acid in a membrane-free electrolyzer, where electrolysis occurs to generate the hypochlorous acid solution.

Reaction Overview:

Overall Reaction: 2HCl + H₂O → HClO + H₂↑

Electrode Reactions:
Anode: 2Cl⁻ → Cl₂ + 2e⁻
Cathode: 2H⁺ + 2e⁻ → H₂

Solution Reaction: Cl₂ + H₂O → HCl + HClO

This process offers a cost-effective and efficient route to produce hypochlorous acid, suitable for applications in disinfection, water treatment, and related fields.