A phosphate buffer (H₂PO₄^-/HPO₄^2-) has a pH of 8.3. Which of the following changes will cause the pH to increase? A) dissolving a small amount of Na₂HPO₄ B) dissolving a small amount of NaH₂PO₄ 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 will increase the concentration of the base form (HPO₄^2-), which will increase the pH.

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

A Phosphate Buffer (H₂PO₄^-/HPO₄^2-) Has a PH of 8