A laboratory procedure requires a buffer at pH 5.20 made from acetic acid/acetate (acid )

CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases

Problem

A laboratory procedure requires a buffer at pH 5.20 made from acetic acid/acetate (acid

pK_a = 4.76

). Calculate the required ratio

\displaystyle \frac{[\text{acetate}]}{[\text{acetic acid}]}

(to two significant figures) in the final solution.