Question:
In order to prepare a buffer solution of $\mathrm{pH} 5.74$ 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:pKa (acetic acid) $=4.74]$
Solution:
(10)
$\mathrm{pH}=\mathrm{pKa}+\log \frac{[\mathrm{CB}]}{[\mathrm{WA}]}$
$5.74=4.74+\log \frac{[\mathrm{CB}]}{1}$
$\Rightarrow[\mathrm{CB}]=10 \mathrm{M}$