Q1. A 25ml solution of quinine was titrated with 1.00 M hydrochloric acid, HCl. It was found that the soluiton contained 0.125 moles of quinine. What was the pH of the solution after 50 ml of the HCl solution were added? Quinine is monobasic with pKb=5.10.

choices:

a. 8.72

b. 5.10

c. 9.08

e. 8.90

Q2. A buffer system is set up with [HA]=2[A]. If pKa=5.5, what is the pH of the buffer?

choices:

a. 7.5

b. 5.2

c. 5.8

d. 7.0