Which of the following mixtures forms a buffe | vedclass

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(D) buffer solution is formed by a mixture of a weak acid and its conjugate base (salt of a strong base).In option $D$,we have $500 \ mL$ of $0.2 \ N

Vedclass · Accepted Answer

$500 \ mL$ of $0.2 \ N \ CH_3COOH + 500 \ mL$ of $0.1 \ N \ NaOH$

Vedclass · Answer

(D) buffer solution is formed by a mixture of a weak acid and its conjugate base (salt of a strong base).In option $D$,we have $500 \ mL$ of $0.2 \ N \ CH_3COOH$ $(0.1 \ 	ext{equivalent})$ and $500 \ mL$ of $0.1 \ N \ NaOH$ $(0.05 \ 	ext{equivalent})$.The reaction is: $CH_3COOH + NaOH ightarrow CH_3COONa + H_2O$.After the reaction,$0.05 \ 	ext{equivalent}$ of $CH_3COOH$ remains and $0.05 \ 	ext{equivalent}$ of $CH_3COONa$ is formed.Since the mixture contains both a weak acid $(CH_3COOH)$ and its salt $(CH_3COONa)$,it acts as an acidic buffer.

Which of the following mixtures forms a buffer solution?

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