Brine is electrolysed by using inert electrodes. The reaction at the anode is:
1. Cl-(aq) → \(\frac{1}{2}\)Cl2(g) + e-; \(E_{cell}^{o}\) = 1.36 V
2. 2H2O(l) → O2(g) + 4H+ + 4 e-; \(E_{cell}^{o}\) = 1.23 V
3. Na+(aq) + e- → Na(s); \(E_{cell}^{o}\) = 2.71 V
4. H+(aq) + e- → \(\frac{1}{2}\)H2(g); \(E_{cell}^{o}\) = 0.00 V
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