A researcher needs 0.50 L of a benzoic acid/sodium benzoate buffer at pH 6.00
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A researcher needs 0.50 L of a benzoic acid/sodium benzoate buffer at pH 6.00. (The pK_a of benzoic acid is 4.20.) Which molar ratio of benzoate ion to benzoic acid will give a pH closest to 6.00?
(a) 6.3:1
(b) 1.8:1
(c) 63:1
(d) 0.016:1