The degree of dissociation of weak acid is directly proportional to

Step-by-step solution

According to Ostwald's dilution law for a weak acid HA , the dissociation constant K_a is given by: K_a = C ^2 1- For a weak acid, the degree of dissociation is very small ( 1 ), so 1- 1 . K_a C ^2 = K_a C The concentration C is the number of moles per unit volume. For 1 mole of the weak acid, C = 1 V , where V is the volume of the solution. Substituting C = 1 V into the expression for : = K_a V V Thus, the degree of dissociation is directly proportional to the square root of the volume of the solution containing 1