Which of the Following Mixtures Would You Dismiss as a Potential

Multiple Choice

Which of the following mixtures would you dismiss as a potential buffer in a laboratory?

A) mixing equal volumes of 0.10 M NaC₂H₃O₂(aq) and 0.10 M HCl(aq) .
B) mixing equal volumes of 0.10 M NaC₂H₃O₂(aq) and 0.050 M HCl(aq) .
C) mixing equal volumes of 0.10 M NaC₂H₃O₂(aq) and 0.10 M HC₂H₃O₂(aq) .
D) mixing equal volumes of 0.10 M HC₂H₃O₂(aq) and 0.050 M NaOH(aq) .