Four acetate buffer solutions are prepared at

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

Problem

Four

0.10\,\text{M}

acetate buffer solutions are prepared at

25^{\circ}\text{C}

, each with the indicated mole ratio of acetic acid

(\text{HA})

to acetate ion

(\text{A}^-)

. Which buffer would have the greatest capacity to resist a pH increase when a strong base is added? (a)

1:1\,(\text{HA} : \text{A}^-)

(b)

1:3\,(\text{HA} : \text{A}^-)

(c)

3:1\,(\text{HA} : \text{A}^-)

(d)

2:1\,(\text{HA} : \text{A}^-)