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

question 97

Multiple Choice

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

---

Definitions:

Illegal Contract

An agreement between parties that is prohibited by law or violates legal statutes, making it unenforceable.

Breach

To violate a law, by an act or an omission, or to break a legal obligation that one owes to another person or to society.

Illegal Contract

An agreement that is either unlawful in nature or made with the purpose of undertaking an illegal act, and thus, is not enforceable by law.

Executory

Pertaining to contracts or agreements that are not yet fully performed or completed by all involved parties.