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In order to prepare a buffer solution of pH 5.74,

Question:

In order to prepare a buffer solution of pH 5.74, sodium acetate is added to acetic acid. If the concentration of acetic acid in the buffer is $1.0$ M, the concentration of sodium acetate in the buffer is_________M. (Round off to the Nearest Integer).

[Given : $\mathrm{pKa}$ (acetic acid) $=4.74]$

Solution:

$\mathrm{pH}=\mathrm{pKa}+\log \frac{[\mathrm{CB}]}{[\mathrm{WA}]}$

$5.74=4.74+\log \frac{[\mathrm{CB}]}{1}$

$\Rightarrow[\mathrm{CB}]=10 \mathrm{M}$

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