Which of the following buffer systems is most effective, given the concentrations: 0.1 M acetic acid and 0.01 M sodium acetate, or 0.1 M acetic acid and 0.1 M sodium acetate?

• A. Neither is effective
• B. 0.1 M acetic acid and 0.1 M sodium acetate
• C. Both are equally effective
• D. 0.1 M acetic acid and 0.01 M sodium acetate

Answer: (B)