Which of the following is a buffer solution?

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Question

(D) buffer solution is a mixture of a weak acid and its conjugate base (salt) or a weak base and its conjugate acid (salt).$PhCOOH$ (benzoic acid) is

Vedclass · Accepted Answer

$A$ solution of $PhCOOK$ and $PhCOOH$

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(D) buffer solution is a mixture of a weak acid and its conjugate base (salt) or a weak base and its conjugate acid (salt).$PhCOOH$ (benzoic acid) is a weak acid and $PhCOOK$ (potassium benzoate) is its salt with a strong base.Therefore,the mixture of $PhCOOH$ and $PhCOOK$ forms an acidic buffer solution.Other options do not represent a weak acid-conjugate base or weak base-conjugate acid pair.

Similar Questions

Explain the preparation of an acidic buffer solution with an example.

$0.1 \ mol$ of $CH_3NH_2$ $(K_b = 5 \times 10^{-4})$ is mixed with $0.08 \ mol$ of $HCl$ and diluted to $1 \ L$. The $[H^{+}]$ in the solution is:

Which of the following mixtures will produce a buffer solution with $pH = 9$?

What is $[H^{+}]$ in $mol/L$ of a solution that is $0.20\, M$ in $CH_3COONa$ and $0.10\, M$ in $CH_3COOH$? $K_a$ for $CH_3COOH = 1.8 \times 10^{-5}$.

When $0.02 \ mol$ of $NaOH$ is added to $1 \ L$ of a buffer solution,its $pH$ changes from $5.75$ to $5.80$. What is the buffer capacity of the solution?

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