which of the following mixtures would you dismiss as a potential buffer in a lab

Question

which of the following mixtures would you dismiss as a potential buffer in a laboratory?
a: mixing equal volumes of 0.10 M NaC2H3O2 and 0.050 M HCl
B: mixing equal volumes of 0.0 M HC2H3O2 and 0.050 M NaOH
C: mixing equal volumes of NaC2H3O2 and 0.10M HC2H3O2
D: mixing equal volumes of 0.10M NaC2H3O2 and 0.0M HCl
the answer is supposed to be D
can someone explain why? which of the following mixtures would you dismiss as a potential buffer in a laboratory?
a: mixing equal volumes of 0.10 M NaC2H3O2 and 0.050 M HCl
B: mixing equal volumes of 0.0 M HC2H3O2 and 0.050 M NaOH
C: mixing equal volumes of NaC2H3O2 and 0.10M HC2H3O2
D: mixing equal volumes of 0.10M NaC2H3O2 and 0.0M HCl
the answer is supposed to be D
can someone explain why?

Explanation / Answer

B: mixing equal volumes of 0.0 M HC2H3O2 and 0.050 M NaOH

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