Calculating Volume Needed for Level of pH
A 1.00g sample of benzoic acid (C6H5CO2H, FW = 122.12g/mol,Ka = 6.5 x 10^ -5) is dissolved in water to give a solution with a volume of 500mL. What volume of 2.13M aqueous sodium benzoate (NaC6H5CO2) must be added to the aqueous benzoic acid solution to obtain a buffer with pH = 5.00?