Which of the Following Acids Should Be Used to Prepare

question 71

Multiple Choice

Which of the following acids should be used to prepare a buffer with a pH of 4.5?

• A)HOC ₆H ₄OCOOH, K _a = 1.0 × 10 ⁻³
• B)C ₆H ₄(COOH)₂, K _a = 2.9 × 10 ⁻⁴
• C)CH ₃COOH, K _a = 1.8 × 10 ⁻⁵
• D)C ₅H ₅O ₅COOH, K _a = 4.0 × 10 ⁻⁶
• E)HBrO, K _a = 2.3 × 10 ⁻⁹

---

Definitions:

Eighth-Grade Students

Typically refers to students who are in the eighth grade, usually between the ages of 13 and 14, in the education system of many countries.

U.S. Public Schools

Educational institutions in the United States that are operated by government funding and are accessible to all children without charge.

Stereotype Threat

A psychological phenomenon where individuals fear being judged or treated stereotypically, which can negatively affect their performance in various settings.

Disadvantaged Groups

Communities or populations that face social, economic, or political barriers that prevent them from accessing the same opportunities or resources as other segments of society.