(a) Following reactions occur at cathode during the electrolysis of aqueous copper (II) chloride solution :
`1Cu^(2+) (aq) + 2e^( -) to Cu (s), E° = + 0.34 V`
`H^(+)+ (aq) + e^(-) to 1/2 H_(2)` (g)
On the basis of their standard reduction electrode potential (E°) values, which reaction is feasible at the cathode and why?
(b) State Kohlrausch law of independent migration of ions. Write its one application.

Explanation

(a) That reaction will take place which has greater value of electrode potential. Thus the following reaction takes place `Cu^(2+) (aq) + 2e^(-) to Cu (s)`
(b) Limiting molar conductivity of an electrolyte can be represented as the sum of the individual
contributions of the anion and cation of the electrolyte. Application : Using Kohlrausch law of independent migration of ions, it is possible to calculate `Lambda_(m)^(@)` for any electrolyte from the `Lambda^(@)` values of individual ions.