The concentration of benzoic acid is 0.2 M Using the ICE Method HC7H6O2 <=> H+ + C7H6O2- 0.2 -3.55 x 10-3 3.55 x 10-3 3.55 x 10-3 ------------------------------------------------------ 0.189 3.55 x 10-3 3.55 x 10-3 Ka = (3.55 x 10-3)(3.55 x 10-3)/(0.189) Ka = 6.67 x 10-5
