A 250 ML Solution of Quinine Was Titrated with 1

Multiple Choice

A 25.0 mL solution of quinine was titrated with 1.00 M hydrochloric acid, HCl. It was found that the solution contained 0.125 moles of quinine. What was the pH of the solution after 50.00 mL of the HCl solution were added? Quinine is monobasic with pK_b  5.10.

A) 5.10
B) 8.90
C) 8.72
D) 4.92
E) 9.08