A student mixes 50.0 mL of 0.20 M acetic acid ( ) with 50.0 mL of 0.20 M sodium…

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

Problem

A student mixes 50.0 mL of 0.20 M acetic acid (

CH_3COOH

) with 50.0 mL of 0.20 M sodium acetate (

CH_3COONa

). The

pK_a

of acetic acid at 25 °C is 4.74. What is the pH of the resulting solution (assume volumes are additive)? (a)

5.04

(b)

3.74

(c)

4.74

(d)

5.74