2. why does a diprotic acid dissociate in a stepwise manner? 3. 4 calculate the ph at each of the following points in the titration of 50.00 ml of a 0.150m acetic acid using 0.275m naoh. (show work below: ) (k, 1.8 x 10-5) (you can also refer to pages om your textbook for . initial ph: 0 ml of base added halfway to equivalence point 5.00 ml before equivalence point at equivalence point 5.00 ml beyond equivalence point a. b. c. d. e.