Problem- 10 mL of 1.8 M acetic acid (CH3COOH) is titrated with 1.0 M sodium hydroxide (NaOH). The titration curve is shown.
(a) What is the approximate pKa? (which 4.8 is what I have and it appears correct)
(b) At the pKa, what fraction of the carboxyl group will have been converted to COO-?
Express your answer as a decimal, and not a percent.
State your response as a chemical formula.