A phosphate buffer (H₂PO₄⁻/HPO₄²⁻) has a pH of 8.3. Which of the following changes will cause the pH to increase? A)Dissolving a small amount of Na ₂HPO ₄ B)Dissolving a small amount of NaH ₂PO ₄ C)Adding a small amount of dilute hydrochloric acid D)Adding a small amount of dilute phosphoric acid E)Making the buffer more concentrated by removing some water

Question

Quizplus · Accepted Answer

Dissolving Na₂HPO₄ increases the concentration of the base form (HPO₄²⁻), shifting the equilibrium to the right and increasing the pH.

A Phosphate Buffer (H2PO4−/HPO42−) Has a PH of 8

A Phosphate Buffer (H₂PO₄⁻/HPO₄²⁻) Has a PH of 8