In the following reaction H 2 PO 4 − + H 2 O ⇌ HPO 4 2 − + H 3 O + A = H 2 PO 4 − , B = H 2 O , C = HPO 4 2 − , D = H 3 O +

Question

In the following reaction H 2 ​ PO 4 − ​ + H 2 ​ O ⇌ HPO 4 2 − ​ + H 3 ​ O + A = H 2 ​ PO 4 − ​ , B = H 2 ​ O , C = HPO 4 2 − ​ , D = H 3 ​ O +

TestHub · Accepted Answer

A donates a proton, so A is an acid; B accepts it, so B is a base: (A) is correct.

C is formed when A loses $H^{+}$ , so C is the conjugate base of A: (B) is wrong.

D = $H_{3} O^{+}$ is formed when B gains $H^{+}$ , so D is the conjugate acid of B: (C) is correct and (D) is wrong.

Answer: (A), (C).

Chemistry - Ionic Equilibrium Question with Solution | TestHub