Determine the Acid Dissociation Constant for a 0

Multiple Choice

Determine the acid dissociation constant for a 0.020 M formic acid solution that has a pH of 2.74.Formic acid is a weak monoprotic acid and the equilibrium equation of interest is HCOOH(aq) + H₂O(l) ⇌ H₃O⁺(aq) + HCO₂^-(aq) .

A) 1.8 × 10^-3
B) 1.8 × 10^-4
C) 3.6 × 10^-4
D) 3.6 × 10^-5