a) Prepare 3 liters of 0.5 M glutamic acid buffer, with pH 4.1, from solid glutamic acid (pKa=4.2) and 2 M NaOH. How many grams of solid glutamic acid (MW=147 g/mol) would you have to use and how many mls of 2 M NaOH would you need?

b) Prepare 2 liters of 0.5 M "lactate" buffer with a pH of 4.0, using a 2 M solution of lactic acid (pKa=3.86) and a 1M solution of sodium lactate. (Note: a 0.5 M buffer has a total concentration of 0.5M by adding [HA] and [A-])