Exercise 4 How many grams of sodium hydroxide must be added to a 500 mL solution of 1.0 M acetic acid to produce a buffer solution buffered with pH = 5.00? (Assume the final volume is 500. mL, and for acetic acid, Ka = 1.8-10-5) Exercise 5 For the component ethyl butanoate estimate the critical properties, the enthalpy of formation, the free energy and the vapor pressure at 400 K. When possible compare the estimated values with the experimental ones