Question- What is the pH of a 1.0L buffer sample that contains 0.10 mole benzoic acid (C6H5COOH) and 0.10 mol sodium benzoate
(N3C6H5COO) to which 0.010 mol of HCL has been added? (ka benzoic acid= 6.5*10^-5)
Express your answer to two significant figures and include the appropriate units.