MEDIUMMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryIonic equilibriumBuffer Solutions
A physician wishes to prepare a buffer solution at pH = 3.58 that efficiently resists a change in pH yet contains only small conc. of the buffering agents. Which one of the following weak acid together with its sodium salt would be best to use?
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).✓ Correct
Explanation
We know that pH of acidic buffer is- a a a pH pK log[salt]/[acid] pH pK if [salt] [acid] pK 3.58 given for acetoacetic acid. Therefore,pH 3.58 Relationship Between Ka and Kb for a Conjugate Pair
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