Calculate the Percent Ionization of Nitrous Acid in a Solution

Multiple Choice

Calculate the percent ionization of nitrous acid in a solution that is 0.249 M in nitrous acid. The acid dissociation constant of nitrous acid is 4.50 × 10^{- 4}.

A) 5.53
B) 0.342
C) 4.25
D) 0.0450
E) 1.12 × 10^{- 4}