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)
E) mixing equal volumes of 0.10 M NH₃(aq) and 0.10 M of NH₄Cl(aq)