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

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

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(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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