8) 10.0 ml of .15M H3A (Ka1 = 2.5 x 10-4, Ka2 = 3.5 x 10-8, Ka3 = 5.0 x 10-12) is titrated with 10M NaOH. a) Sketch the titration curve and write in these values on the graph: ml of NaOH used at each endpoint, pH at the start, pH at each endpoint (except the last), pH's at 10%, 90%, and midway through each buffer region, and pH at 50ml past the last endpoint. b) What is the major species at pH = 10.0? (use your curve to prove your answer)