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QUESTION
Which of the following weak acids would be the best choice for a pH = 4 buffer?
Which of the following weak acids would be the best choice for a pH = 4 buffer?
Acetic acid (Ka=1.75E-5)
Arsenic acid (Ka=2.51E-5)
Benzoic acid (Ka=6.28E-5)
Formic acid (Ka=1.8E-4)
Hypochlorous acid (Ka=3.0E-8)
Iodic acid (Ka=1.7E-1)
