A 200.0 mL aqueous mixture is 0.150 M formic acid and 0.110 M sodium formate ( )
CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A 200.0 mL aqueous mixture is 0.150 M formic acid and 0.110 M sodium formate (pKa=3.75). First, 5.0 mL of 0.500 M NaOH is added and mixed thoroughly. A second 5.0 mL portion of 0.500 M NaOH is then added. Volumes are strictly additive. Determine the pH of the solution after the second addition. Express your answer to two decimal places.