Question

Brine is electrolysed by using inert electrodes. The reaction at anode is ________.

(i) Cl^– (aq.) →1/2Cl₂ (g) + e^– ;    E^Θ_Cell = 1.36V

(ii) 2H₂O (l ) → O₂ (g) + 4H⁺ + 4e^– ; E^Θ_Cell= 1.23V

(iii) Na⁺ (aq.) + e^– → Na(s) ;  E^Θ_Cell = 2.71V

(iv) H⁺ (aq.) + e^–→1/2H₂ (g) ; E^Θ_Cell = 0.00V

Answer 1

(i) Cl^– (aq.) →1/2Cl₂ (g) + e^– ;    E^Θ_Cell = 1.36V