In the electrolysis of aqueous sodium chloride

Question:

In the electrolysis of aqueous sodium chloride solution which of the half cell

reaction will occur at anode?

(i) Na+(aq) + e– → Na (s); E°Cell = –2.71V

(ii) 2H2O (l) → O2(g) + 4H+(aq) + 4e– : E°Cell = 1.23V

(iii) H+(aq) + e–→1/2H2 (g); E°Cell = 0.00V

(iv) Cl–(aq) →1/2Cl2(g) + e– ; E°Cell = 1.36V

Solution:

Option (iv)  Cl–(aq) →1/2Cl2(g) + e– ; E°Cell = 1.36V is the answer.

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