Which of the following buffers will have the lowest pH? A) a solution containing 0.20 M HC₂H₃O₂ and 0.20 M NaC₂H₃O₂ B) a solution containing 0.25 M HC₂H₃O₂ and 0.15 M NaC₂H₃O₂ C) a solution containing 0.15 M HC₂H₃O₂ and 0.25 M NaC₂H₃O₂ D) They all have the same pH.

Question

Quizplus · Accepted Answer

The buffer with the lowest pH will have a higher concentration of the weak acid (HC2H3O2) relative to its conjugate base (NaC2H3O2). Option B has a higher concentration of the acid (0.25 M) compared to the base (0.15 M), resulting in a lower pH.

Which of the Following Buffers Will Have the Lowest PH