A buffer solution is prepared by dissolving 5.10 g of benzoic acid (C₆H₅COOH
CHEMISTRY · Subjective · AP · Chemistry · Acids and Bases · Acids and Bases
Problem
A buffer solution is prepared by dissolving 5.10 g of benzoic acid (C₆H₅COOH, molar mass = 122.1 g mol⁻¹) and 7.68 g of sodium benzoate (C₆H₅COONa, molar mass = 144.1 g mol⁻¹) in enough water to make 250.0 mL of solution at 25 °C. The pKa of benzoic acid at this temperature is 4.19.
Calculate the pH of the buffer.