The pK_a of hypochlorous acid is 7.530. A 55.0 mL solution of 0.120 M sodium hypochlorite (NaOCI) is titrated with 0.297 M HCI. Calculate the pH of the solution a) after the addition of 7.96 mL of 0.297 M HCI. pH = b) after the addition of 23.2 mL of 0.297 M HCI. pH = c) at the equivalence point with 0.297 M HCI. pH =