Question

The degree of ionization of 0.10 M solution of a weak monobasic acid is 4%. Find the value of K_a.

Options

• 1.6 × 10⁻³

• 1.6 × 10⁻⁴

• 1.6 × 10⁻²

• 1.6 × 10⁻⁵

Answer 1

1.6 × 10⁻⁴

Explanation:

K_a = `∝^2"C"`

= (0.04)² × (0.10)

= 1.6 × 10⁻⁴