A buffer mixture of acetic acid and potassium acetate has

$pH=5.24andp{K}_a=4.74$ . Then, the ratio of

$\left[C{H}_{3}CO{O}^{-}\right]to\left[C{H}_{3}COOH\right]$   in this buffer is approximately  equal to

            $5.24=4.74=\log \frac{\left[salt\right]}{\left[Acid\right]}$

            $5.24-4.74=\log \frac{\left[salt\right]}{\left[Acid\right]}$

            $0.5=\log \frac{\left[salt\right]}{\left[Acid\right]}$

            $Anti\log \frac{\left[salt\right]}{\left[Acid\right]}$

            $\frac{\left[salt\right]}{\left[Acid\right]}$

            $\Rightarrow \left[Salt\right]:\left[Acid\right]=3:1$