Topic: Ionization constants, ionization of water, pH scale· Equilibrium
Phosphoric acid ionizes in three steps with 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. K = K_a_1 + K_a_2 + K_a_3B. H_3PO_4 is a stronger a…
Phosphoric acid ionizes in three steps with 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. \(\mathrm{H_3PO_4}\) is a stronger acid than \(\mathrm{H_2PO_4^-}\) and \(\mathrm{HPO_4^{2-}}\).
C. \(K_{a_1} > K_{a_2} > K_{a_3}\)
D. \(K_{a_1} = \frac{K_{a_3}+K_{a_2}}{2}\)
Choose the correct answer from the options given below:
1. A and B only
2. A and C only
3. B, C and D only
4. A, B and C only