Buffer Solution with Acetic Acid and Sodium Acetate

Medium General Chemistry Acids And Bases

In a laboratory, a chemist is preparing a buffer solution using acetic acid (CH₃COOH) and sodium acetate (CH₃COONa). The chemist intends to maintain a pH of around 4.75, which is the pKa of acetic acid. To achieve this, they carefully measure the concentrations of acetic acid and sodium acetate that they will mix.

Which of the following statements about the buffer solution prepared with acetic acid and sodium acetate is correct?

The buffer will resist changes in pH when small amounts of strong acids are added.

The buffer will maintain a pH of 7.4 regardless of the concentrations of acetic acid and sodium acetate.

The buffering capacity is maximized when the concentrations of acetic acid and sodium acetate are equal.

Sodium acetate will fully dissociate into sodium ions and acetate ions at any given pH.

Hint

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