Question

How can you experimentally determine the pK_a of acetic acid?

Answer 1

At half-equivalence point, half the total volume of sodium hydroxide solution consumed would have reacted. Using the graph, the pH corresponding to half the total volume of sodium hydroxide solution consumed is determined. Thus, the pH equals the pKa of acetic acid.

Answer 2

At half-equivalence point, half the total volume of sodium hydroxide solution consumed would have reacted. Using the graph, the pH corresponding to half the total volume of sodium hydroxide solution consumed is determined. Thus, the pH equals the pKa of acetic acid.