The pKa values for the dibasic base B are pKa1 = 2.10 and pKa2 = 7.67. Calculate the pH at each of the points in the titration of 50.0 ml of a 0.60 M B(aq) solution with 0.60 M HCl(aq).
a) pH1 = 2.10, pH2 = 7.67
b) pH1 = 7.67, pH2 = 2.10
c) pH1 = 9.37, pH2 = 4.83
d) pH1 = 4.83, pH2 = 9.37