Of the following, which is the best base to create a buffer with a pH = 8.0?
a. Aniline, Kb = 4.3 x 10-10
b. Ethylamine, Kb = 6.4 x 10-4
c. Hydrazine, Kb = 1.3 x 10-6
d. Pyridine, Kb = 1.7 x 10-9
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