Which of the Following Solutions Represents a Good Buffer System

Multiple Choice

Which of the following solutions represents a good buffer system?

A) a solution that is 0.10 mol L^-1 CH₃COOH and 0.10 mol L^-1 CH₃COOLi
B) a solution that is 0.10 mol L^-1 HF and 0.10 mol L^-1 CH₃COONa
C) a solution that is 0.10 mol L^-1 HCl and 0.10 mol L^-1 NH₄⁺
D) a solution that is 0.10 mol L^-1 NaOH and 0.10 mol L^-1 KOH
E) a solution that is 0.10 mol L^-1 HCl and 0.10 mol L^-1 KCl