A 20.00 mL sample of a 0.1000 M unknown acid solution is titrated with 0.1000 M NaOH (the acid is Diprotic with pka's of 1.90 and 6.70).
A) Estimate the pH after 10 mL, 20 mL and 30 mL of base are added.
B) Sketch the titration curve and label all the points of interest (equivalence points).