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

question 44

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 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

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