Calculate the pH of buffer solution containing 0.04 M NaF and $0.02 \mathrm{MHF}\left[\mathrm{pK}_a=3 \cdot 142\right]$.

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Aicharya · Accepted Answer

0.04 M NaF and 0.02 M HF forms an acidic buffer. $\begin{aligned} \mathrm{pH} & =\mathrm{pK}_{\mathrm{a}}+\log _{10} \frac{[	ext { Salt }]}{[	ext { Acid }]} \ & =3.142+\log _{10} \frac{(0.04)}{(0.02)} \ & =3.142+0.3010 \ & =3.44 \approx 3.4 \end{aligned}$

Calculate the pH of buffer solution containing 0.04 M NaF and $0.02 \mathrm{MHF}\left[\mathrm{pK}_a=3 \cdot…

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