Which acid would you use to make a buffer with a pH of 3.0?
Acid
Ka
pKa
Chloroacetic Acid
1.35x10-3
2.9
Benzoic Acid
6.4x10-5
4.2
Acetic Acid
1.8x10-5
4.7
Chloroacetic Acid Benzoic Acid Acetic Acid