Which of the following buffers will have the lowest pH?
A) a solution containing 0.10 M HC2H3O2 and 0.10 M NaC2H3O2
B) a solution containing 0.20 M HC2H3O2 and 0.20 M NaC2H3O2
C) a solution containing 0.30 M HC2H3O2 and 0.30 M NaC2H3O2
D) They all have the same pH.
D
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