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An acidic buffer is prepared by mixing: (The $pK_a$ of acid = $pK_b$ of the base)
A
weak acid and it's salt with strong base
B
equal volumes of equimolar solutions of weak acid and weak base
C
strong acid and it's salt with strong base
D
strong acid and it's salt with weak base
Detailed Solution
An acidic buffer is prepared by mixing a weak acid and its salt with a strong base (e.g. acetic acid and sodium acetate), which resists changes in pH on the acidic side.