An analytical chemist is titrating 74.3mL of a 0.7400M solution of acetic acid HCH3CO2 with a 0.2200M solution of KOH. The pKa of acetic acid is 4.70. Calculate the pH of the acid solution after the chemist has added 275.mL of the KOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of KOH solution added.