Ionic EquilibriumHard
Question
A physician wishes to prepare a buffer solution at pH = 3.58 that efficiently resists a change in pH yet contains only small concentrations of the buffering agents. Which one of the following weak acid together with its sodium salt would be best to use?
Options
A.m-chloro benzoic acid (pKa = 3.98)
B.p-chlorocinnamic acid (pKa = 4.41)
C.2,5-dihydroxy benzoic acid (pKa = 2.97)
D.acetoacetic acid (pKa = 3.58)
Solution
For maximum buffer capacity, PH = PKa
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