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

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