If you want to make a buffer with a pH of 9.4, which base
CHOOSE ONE
1.0 M ammonia, pKb
= 4.74
1.0 M sodium carbonate,
pKb = 3.67
solid sodium bicarbonate
(84.01 g/mol)
solid ammonium chloride
(53.49 g/mol)
solid sodium acetate
(82.034 g/mol)
solid sodium formate
(68.01 g/mol)

and conjugate acid
CHOOSE ONE
1.0 M acetic acid,
pKa = 4.74
1.0 M formic acid, pKa
= 3.74
1.0 M ammonia, pkb
= 4.74
solid ammonium chloride
(53.49 g/mol)
solid sodium bicarbonate
(84.01 g/mol)
solid sodium acetate
(82.034 g/mol)
solid sodium formate
(68.01 g/mol)

would you chose from the list below?