MCQ
$p{K_a}$ of a weak acid is defined as
- A$log_{10}{K_a}$
- B$\frac{1}{{lo{g_{10}}{K_a}}}$
- ✓$log _{10}\frac{1}{{{K_a}}}$
- D$-log_{10}\frac{1}{{{K_a}}}$
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$HA \to A^-+ H^+$ , $\Delta H = Z$
$H^+ + OH^-\to H_2O$, $\Delta H = X$
$HA + OH^-\to A^-+ H_2O$, $\Delta H = Y$
${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(g)$ is $\Delta {H_1}$ and that of
${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(l)$ is $\Delta {H_2}$. Then