Which of the Following Acids Should Be Used to Prepare

question 6

Multiple Choice

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

• A) HOC₆H₄OCOOH, K_a = 1.0 *10¯³
• B) C₆H₄(COOH)₂, K_a = 2.9 *0 10¯⁴
• C) CH₃COOH, K_a = 1.8 * 10¯⁵
• D) C₅H₅O₅COOH, K_a = 4.0 * 10¯⁶
• E) HBrO, K_a = 2.3 * 10¯⁹

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