Calculate the pH of buffer solution containing 0:027M weak acid and 0.054 M of its salt with strong base if $\mathrm{pK}_{\mathrm{a}}$ is 4.2 .

Question

Aicharya · Accepted Answer

For an acidic buffer solution, $\begin{aligned} \mathrm{pH} & =\mathrm{pK}_{\mathrm{a}}+\log _{10} \frac{[	ext { Salt }]}{[	ext { Acid }]} \ & =4.2+\log _{10} \frac{0.054}{0.027}=4.2+\log _{10} 2 \ 	herefore \quad \mathrm{pH} & =4.2+0.3010=4.50 \end{aligned}$

Calculate the pH of buffer solution containing 0:027M weak acid and 0.054 M of its salt with strong base if…

Solution