The pH of solution containing 0.10 M sodium acetate and 0.03 M acetic acid is $\left(\mathrm{p} K_a\

Question

The pH of solution containing 0.10 M sodium acetate and 0.03 M acetic acid is $\left(\mathrm{p} K_a\right.$ for $\left.\mathrm{CH}_3 \mathrm{COOH}=4.57\right)$

Professor PC Thomas Classes · Answer

(c) : According to Henderson's equation,\ $\mathrm{pH}=\mathrm{p} K_a+\log \frac{[	ext { Salt }]}{[	ext { Acid }]}$\ $\mathrm{CH}_3 \mathrm{COOH}+\mathrm{NaOH} \longrightarrow \mathrm{CH}_3 \mathrm{COONa}+\mathrm{H}_2 \mathrm{O}$\ \ Putting the values, \ we get : $ \mathrm{pH}=4.57+\log \frac{0.10}{0.03} \Rightarrow \mathrm{pH}=5.09 $