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

question 19

Multiple Choice

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 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

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