Glycolic Acid, Which Is a Monoprotic Acid and a Constituent

Multiple Choice

Glycolic acid, which is a monoprotic acid and a constituent in sugarcane, has a pK_a of 3.9.A 25.0 mL solution of glycolic acid is titrated to the equivalence point with 35.8 mL of 0.020 M sodium hydroxide solution.What is the pH of the resulting solution at the equivalence point?

A) 4.12
B) 9.88
C) 6.01
D) 7.99
E) Insufficient information is provided to determine the pH.