The pa of hypochlorous acid is 7.530 . A 51.0 mL solution of 0.141 M sodium hypochlorite ( NaOCl ) is titrated with 0.342 M HCl . Calculate the pH of the solution after the addition of 8.18 mL of 0.342 M HCl .

pH=
Calculate the pH of the solution after the addition of 21.8 mL of 0.342 M HCl .
pH=
Calculate the pH of the solution at the equivalence point with 0.342 M HCl .
pH=