(i) On dilution ${\wedge }_{\mathit{m}}$ of ${\mathrm{CH}}_3\mathrm{COOH}$ increases very fast because it is a weak electrolyte and the number of ions also increases due to increase in the degree of dissociation (less than 1). However,in ${\mathrm{CH}}_3\mathrm{COONa}$ which is a strong electrolyte, the number of ions remains same but the intermolecular forces of attraction decreases and the degree of dissociation is equal to 1 . Thus, ${\wedge }_{\mathit{m}}$ increases gradually in case of ${\mathrm{CH}}_3\mathrm{COONa}$.
(ii) If the external potential applied become greater than ${\mathit{E}}^{\circ }$ cell of electrochemical cell, then the reaction gets reversed and the electrochemical cell acts as an electrolytic cell and vice-versa.