A buffer is prepared with 0.245 M benzoic acid (HA) and 0.135 M sodium benzoate (NaA)
CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A buffer is prepared with 0.245 M benzoic acid (HA) and 0.135 M sodium benzoate (NaA). The measured pH of the solution is 4.15 at 25 °C. Determine the pKa of benzoic acid, expressing your answer to two decimal places.