Calculate the pH during the titration of 10.00 mL of 0.400 M hypochlorous acid with 0.500 M NaOH. First what is the initial pH (before any NaOH is added)? The initial ph is 3.96. 1. What is the pH after 2.60 mL of NaOH are added? 2. What is the pH after 4.80 mL of NaOH are added?