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NEET levelSingle correct optionDifficulty 1 of 3ie114

A buffer has the maximum buffer capacity when

A $[salt] ≪ [acid]$
B $[salt] ≫ [acid]$
C $[salt] = [acid]$ , i.e. $pH = p K_{a}$
D $pH = 7$ for every buffer

Answer: C

Capacity is largest when the buffer has comparable amounts of both components that can neutralise added base and added acid, i.e. salt/acid = 1 and pH =

p K_{a}

.

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