Which combination of the following substances will result in the formation of an acidic buffer when mixed?
Weak acid and its salt with a strong base.
Equal volumes of equimolar solutions of weak acid and weak base.
Strong acid and its salt with a strong base.
Strong acid and its salt with a weak base. (The of acid = of the base)
An acidic buffer solution is prepared by mixing a weak acid and its salt formed with a strong base . For example, a mixture of acetic acid (a weak acid) and sodium acetate (its salt with a strong base) acts as an acidic buffer solution around pH 4.75 .
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