Question
Find the $p K_{a} .$ For an acid $\mathrm{HA}$, the concentrations of HA and $\mathrm{A}^{-}$ are 0.075 and $0.025,$ respectively, at $\mathrm{pH} 6.0$ What is the $\mathrm{p} K_{\mathrm{a}}$ value for $\mathrm{HA}$ ?
Step 1
We can use the Henderson-Hasselbalch equation to find the pKa. The Henderson-Hasselbalch equation is given by: \[pH = pKa + log\left(\frac{[A^-]}{[HA]}\right)\] Show more…
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