1. Quiz
1. What is the equilibrium pH of a M solution of the diprotic 1,5-pentanedioic acid? pKa1 = and pKa2 = Show your work.
a b. 2.6
c d x 10-3
2. From problem 1 above, what is the equilibrium concentration of the base form of 1,5-pentanedioic acid?
a x 10-3 M b M
c x M d x 10-6

2. Quiz 3. Consider a buffer solution made from the weak base A2- with
pKa1 = 4.5 and pKa2 = In a buffer solution with pH = 8.7, which Henderson-Hasselbalch equation should be used for calculations?
a b.
c d.
4. Consider a buffer where the [HA] + [A-] = M and [A-] / [HA] = What is [HA]? Show your work.
a M b x 10-2 M
c M d. none of these