Two buffer solutions are prepared at 25 °C using acetic acid and sodium acetate in a…
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
Two buffer solutions are prepared at 25 °C using acetic acid and sodium acetate in a 1:1 mole ratio.
• Buffer A: 0.10 M CH3COOH and 0.10 M CH3COO⁻
• Buffer B: 0.50 M CH3COOH and 0.50 M CH3COO⁻
Equal volumes of each buffer are available. Which buffer can neutralize the larger amount of added 0.10 M NaOH before its pH changes appreciably?
(a) Buffer A only
(b) Neither buffer can neutralise an appreciable amount of base because each solution already contains an acid
(c) Buffer B only
(d) Both buffers neutralise the same amount because their pH values are identical