What Is the Hydronium Ion Concentration of a 0

Multiple Choice

What is the hydronium ion concentration of a 0. 150 mol L^-1 hypochlorous acid solution with Ka=3.5 x 10-8 ? The equation for the dissociation of hypochlorous acid is below: HOCl_(aq) +H₂O(l) ⇌ H₃O+(aq) +OCl-_(aq)

A) 1.9 × 10^-4 mol L^-1
B) 7.2 × 10^-4 mol L^-1
C) 2.8 × 10^-5 mol L^-1
D) 7.2 × 10^-5 mol L^-1