Question

Given a diprotic acid, H2A, with two ionization constants of Ka1 = 3.57× 10–4 and Ka2 = 3.14× 10–12, calculate the pH and molar concentrations of H2A, HA–, and A2– for each of the solutions below.

(a) a 0.182 M solution of H2A
(b) a 0.182 M solution of NaHA
(c) a 0.182 M solution of Na2A