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 Ka for HOCl is 3.0 x 10-8 M. 1. How many mL of NaOH are added to reach the equivalence point? 2. What is the pH after 2.90 mL of NaOH are added? 3. What is the pH after 6.60 mL of NaOH are added? 4. What is the pH at the equivalence point? 5. What is the pH after 10.40 mL of NaOH are added? 6. What is the pH when half the acid has been neutralized? 7. What is the pH after 18.70 mL of NaOH are added?