Chemistry - Ionic Equilibrium Question with Solution | TestHub

Phosphoric acid ionizes in three steps with their ionization constant values ${\mathrm{K}}_{{\mathrm{a}}_1},{\mathrm{K}}_{{\mathrm{a}}_2}$ and ${\mathrm{K}}_{{\mathrm{a}}_3}$, respectively, While K is the overall ionization constant. Which of the following statements are true? A. $\log \mathrm{K}=\log {\mathrm{K}}_{{\mathrm{a}}_1}+\log {\mathrm{K}}_{{\mathrm{a}}_2}+\log {\mathrm{K}}_{{\mathrm{a}}_3}$ B. ${\mathrm{H}}_3{\mathrm{PO}}_4$ is a stronger acid than ${\mathrm{H}}_2{\mathrm{PO}}_4^{-}$and ${\mathrm{HPO}}_4^{2-}$ C. $K_{a_1}>K_{a_2}>K_{a_3}$ D. ${\mathrm{K}}_{{\mathrm{a}}_1}=\frac{{\mathrm{K}}_{{\mathrm{a}}_3}+{\mathrm{K}}_{{\mathrm{a}}_2}}{2}$ Choose the correct answer from the options given below:NEET 2025