Which May Be Used to Prepare a Buffer Having a PH

question 37

Multiple Choice

Which may be used to prepare a buffer having a pH of 8.8? K_a = 7 × 10^-3 for H₃PO₄; 8 × 10^-8 for H₂PO₄^-; 5 × 10^-13 for HP O₄^2-

• A)NaH₂PO₄ only
• B)NaH₂PO₄ and Na₂HPO₄
• C)Na₃PO₄ and Na₂HPO₄
• D)NaHPO₄ and H₃PO₄
• E)H₃PO₄ and Na₃PO₄

---

Definitions:

Automatically Distributes

Refers to processes or systems that allocate resources, duties, or information without the need for human intervention.

Price Rationing

The process by which the market system allocates goods and services to consumers when quantity demanded exceeds quantity supplied.

Bypass

To go around or avoid an obstacle or regulation, often by using alternative methods or routes.

Costly

Incurring a high expense or requiring considerable resources, often more than expected or desired.