-Which of the above pictures represents a solution of a diprotic acid H₂A for which K_a1 = ∞ and K_a2 is exceptionally small.(Water molecules have been omitted for clarity. )

Question

-Which of the above pictures represents a solution of a diprotic acid H<sub>2</sub>A for which K<sub>a1</sub> = ∞ and K<sub>a2</sub> is exceptionally small.(Water molecules have been omitted for clarity. ) A) picture (a) B) picture (b) C) picture (c) D) picture (d)

Quizplus · Accepted Answer

For a diprotic acid (H2A) with K_a1 = ∞ and K_a2 exceptionally small, the first proton dissociates completely while the second proton hardly dissociates. Thus, the dominant species in solution would be HA^-, which is represented in picture (b).

-Which of the Above Pictures Represents a Solution of a Diprotic