For a buffer in which the pH is 0.30 units higher than the pK_a of its weak acid

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

For a buffer in which the pH is 0.30 units higher than the pK_a of its weak acid, which of the following best approximates the concentration ratio [A⁻]/[HA]? (a) 3:13:1 (b) 0.5:10.5:1 (c) 2:12:1 (d) 5:15:1

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