Calculate the $\mathrm{pH}$ of a buffer solution containing $0.01 \mathrm{M}$ salt and $0.004 \mathrm{M}$ weak acid. $\left(\mathrm{pK}_{\mathrm{a}}=4.762\right)$

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Aicharya · Accepted Answer

$\begin{aligned} \mathrm{pH} & =\mathrm{pK}_{\mathrm{a}}+\log _{10} \frac{[	ext { Salt }]}{[	ext { Acid }]} \ & =4.762+\log _{10} \frac{0.01}{0.004} \ & =4.762+\left(\log _{10} 5-\log _{10} 2ight) \ & =4.762+(0.699-0.3010) \ & =4.762+0.398 \ & =5.16\end{aligned}$

Calculate the $\mathrm{pH}$ of a buffer solution containing $0.01 \mathrm{M}$ salt and $0.004 \mathrm{M}$…

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