Question

Define degree of dissociation. Derive Ostwald’s dilution law for the CH₃COOH.

Answer 1

(A) Degree of dissociation : It is defined as a fraction of total number of moles of an electrolyte that dissociate into its ions at equilibrium.

It is denoted by a and represented by,

(B) Consider V dm³ of a solution containing one mole of CH₃COOH. Then the concentration of acid is, C = 1/V mol dm³. Let α be the degree of dissociation

This is Ostwald’s dilution law.