Calculate the pH values in 10.00 mL of the diprotic o-phtalic acid, 0.100 M C6H4(COOH)2 to which the following volumes (in mL) of a 0.100 M KOH solution are added in a titration. pKa values of the acid are 2.95 and 5.41, respectively.
a. 0.00 b. 4.00 c. 9.90 d. 10.00 e. 14.00 f. 19.00 g. 19.90 h. 20.00 i. 21.00 j. 30.00
Plot pH values as a function of volumes of added KOH and suggest appropriate indicators for the titration.