Question

1) A 34.2 mL sample of a 0.590 M aqueous acetic acid solution is titrated with a 0.203 M aqueous potassium hydroxide solution. What is the pH after 37.1 mL of base have been added?

2) What is the pH at the equivalence point in the titration of a 25.5 mL sample of a 0.351 M aqueous hypochlorous acid solution with a 0.433 M aqueous barium hydroxide solution?

Answer 1

solution: o Cry coon +Koh ? Chcookt +H2O (mmole) (34.2 x0.59) C0.203X37.1) when 37 1 mh was added mmole 20.178 7.5313 20.178-7.53 7.5313 mmol =12.6467 mmol so it is a buffer Ph: PKa + 28 C, co khu (CH₂COOH) PH= 4,76+ og 7. 5313 7pH = 4.53 19.6467 jor acetic acid ca Scanned with Gpka -4.76 CamScanner