The pKa of hypochlorous acid is 7.530. A 52.0 mL solution of 0.115 M sodium hypochlorite (NaOCI) is titrated with 0.339 M HCI. Calculate the pH of the solution after the addition of 5.43 mL of 0.339 M HCI.

Calculate the pH of the solution after the addition of 18.8 mL of 0.339 M HCI.

Calculate the pH of the solution at the equivalence point with 0.339 M HCI.