The Acid- Dissociation Constant for Chlorous Acid, HClO₂, at 25

The acid- dissociation constant for chlorous acid, HClO₂, at 25.0 °C is 1.0 × 10^{- 2}. Calculate the concentration of H⁺ if the initial concentration of acid is 0.10 M.

A) 2.7 × 10^{- 2}
B) 3.2 × 10^{- 2}
C) 3.7 × 10^{- 2}
D) 1.0 × 10^{- 2}
E) 1.0 × 10^{- 3}