For the diprotic weak acid H,A, K. = 2.9 x 10- and Kq2 = 69 x 10- What is the pH of a 0.0800 M solution of H,A? pH = What are the equilibrium concentrations of H, A and A?- in this solution? THAL M IA? M HCIO is a weak acid (K, = 4.0 x 10 ) and so the salt NaClO acts as a weak base. What is the pH of a solution that is 0.040 M in NaClO at 25C? pH =