What Molar Ratio of CH₃COOH to CH₃COONa Should Be Used

question 22

Multiple Choice

What molar ratio of CH₃COOH to CH₃COONa should be used in order to prepare an acetic acid / sodium acetate buffer solution with a pH of 4.00 ± 0.02? [K_a(CH₃COOH) = 1.8 × 10^-5]

• A) 0.18
• B) 0.84
• C) 1.2
• D) 5.6
• E) 0.10

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