Molten NaCl produces Na + Cl ions. NaCl solution (brine) produces Na + Cl + H + OH When we electrolyse brine, the products depend on their reactivity.

The more reactive ions stay in the solution. Na + OH →NaOH (alkaline turns universal indicator blue/ red litmus blue)
What happens in the electrolysis of Brine?

NaCl(aq) → Na + Cl + H + OH

Positive Electrode:
1. The negative chloride ions are attracted to the positive electrode (anode).
2. They lose electrons
3. It Oxidises to form Chlorine Gas (molecules)
4. 2Cl (aq) – 2e → Cl (g)

	Created by Will Manuel over 7 years ago

IGCSE AQA 14.5

Electrolysis