An acetic acid buffer containing 0.50 M CH₃COOH and 0.50 M CH₃COONa has a pH of 4.74. What will the pH be after 0.0020 mol of HCl has been added to 100.0 mL of the buffer? A) 4.77 B) 4.71 C) 4.68 D) 4.62 E) None of these choices is correct.

Question

Quizplus · Accepted Answer

The addition of HCl will convert some CH3COONa to CH3COOH, slightly lowering the pH. The buffer equation shows a small change, resulting in a pH of 4.71.

An Acetic Acid Buffer Containing 0