Question

The degree of dissociation of acetic acid (0.1 mol L⁻¹) in water (K_a of acetic acid is 10⁻⁵) is

(a) 0.01

(b) 0.5

(c) 0.1

(d) 1.0

Answer 1

Answer is : (a) 0.01

Given,

Concentration of acetic acid, C = 0.1 M

K_a of acetic acid = 10^-5

According to Ostwald dilution law,