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 mol L^-1 in nitrous acid. The acid dissociation constant of nitrous acid is 4.50 × 10^-4.

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