Ionization of Polybasic Acids

2025 1 question

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