The dissociation of D₂O is shown below.
D₂O ⇌ D⁺(aq) + OD^-(aq) K = 1.95 × 10^-15 at 25°C
In order to be acidic a D₂O solution must have a pH (= pD) that is

Question

Quizplus · Accepted Answer

The dissociation of D₂O produces H+ ions, making the solution acidic. The equilibrium constant for the dissociation reaction is relatively small (1.95 × 10^-15), indicating that the concentration of H+ ions in the solution will be low. This means that the pH of the solution will be less than 7.35, making choice D the best option.

The Dissociation of D2O Is Shown Below

The Dissociation of D₂O Is Shown Below