Mr ChemCoach Digital Lab

Chapter: Acids, Bases and Salts
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Cl₂
H₂
Semi-Permeable Membrane (Allows Na⁺)
NaOH
+ Brine
Na⁺ (To Cathode)
Cl⁻ (To Anode)
OH⁻ (Forms NaOH)
At Anode (+):
2Cl⁻(aq) → Cl₂(g) + 2e⁻
Overall Reaction:
2NaCl + 2H₂O → 2NaOH + Cl₂ + H₂
At Cathode (-):
2H⁺(aq) + 2e⁻ → H₂(g)