Aqueous solutions of HNO_{3}, KOH, CH_{3}COOH | vedclass

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Question

(C, D) buffer solution is formed by a weak acid and its conjugate base or a weak base and its conjugate acid.$1$. $CH_{3}COOH$ (weak acid) and $CH_{3}

Vedclass · Accepted Answer

$CH_{3}COOH$ and $CH_{3}COONa$

Vedclass · Answer

(C, D) buffer solution is formed by a weak acid and its conjugate base or a weak base and its conjugate acid.$1$. $CH_{3}COOH$ (weak acid) and $CH_{3}COONa$ (salt of weak acid and strong base) form an acidic buffer. Thus, $(D)$ is correct.$2$. When $HNO_{3}$ (strong acid) is mixed with $CH_{3}COONa$ (salt of weak acid) in a ratio such that the salt is in excess, the reaction $HNO_{3} + CH_{3}COO^{-} \rightarrow CH_{3}COOH + NO_{3}^{-}$ occurs. This results in a mixture of the weak acid $(CH_{3}COOH)$ and its conjugate base $(CH_{3}COO^{-})$, which acts as a buffer. Thus, $(C)$ is also correct.

Aqueous solutions of $HNO_{3}$, $KOH$, $CH_{3}COOH$, and $CH_{3}COONa$ of identical concentration are provided. The pair$(s)$ of solutions which form a buffer upon mixing is (are):

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