A buffer solution is prepared by mixing $0.2 \mathrm{M}$ sodium acetate and $0.1 \mathrm{M}$ acetic acid. If $\mathrm{pK}_{\mathrm{a}}$ for acetic acid is 4.7 , find the $\mathrm{pH}$.

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Aicharya · Accepted Answer

Using Henderson's equation, $\begin{aligned} & \mathrm{pH}=\mathrm{pK}_{\mathrm{a}}+\log _{10} \frac{[	ext { Salt }]}{[	ext { Acid }]} \ & \mathrm{pH}=4.7+\log _{10} \frac{0.2}{0.1} \ & \mathrm{pH}=4.7+\log _{10} 2=4.7+0.3010=5.001 \end{aligned}$

A buffer solution is prepared by mixing $0.2 \mathrm{M}$ sodium acetate and $0.1 \mathrm{M}$ acetic acid. If…

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