An analytical chemist is titrating 65.8 mL of a 0.7600 M solution of acetic acid (HCH3CO2) with a 0.3500 M solution of NaOH. The pKa of acetic acid 4.70. Calculate the pH of the acid solution after the chemist has added 78.4 mL of the NaOH solution to it. Note for advanced students: you may assume the final volume equals the initial volume of the solution plus the volume of NaOH solution added. Round your answer to 2 decimal places.