Design a buffer that has a pH of 9.76 using one of the weak base/conjugate acid…

Design a buffer that has a pH of 9.76 using one
of the weak base/conjugate acid systems shown below.

Weak Base
Kb
Conjugate Acid
Ka
pKa

CH3NH2

4.2 x 10-4

CH3NH3+

2.4 x 10-11

10.62

C6H15O3N

5.9 x 10-7

C6H15O3NH+

1.7 x 10-8

7.77

C5H5N

1.5 x 10-9

C5H5NH+

6.7 x 10-6

5.17

How many grams of the chloride salt of the
conjugate acid must be combined with how many grams of the weak
base, to produce 1.00 L of a buffer that is
1.00 M in the weak base?

grams chloride salt of conjugate acid
=  

grams weak base =