(i) On dilution ∧m of CH3‌COOH 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 CH3‌COONa 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, ∧m increases gradually in case of CH3‌COONa.
(ii) If the external potential applied become greater than E∘ cell of electrochemical cell, then the reaction gets reversed and the electrochemical cell acts as an electrolytic cell and vice-versa.