Calculate the pH for each of the following cases in the titration of 35.0 mL of 0.120 M NaOH(aq), with 0.120 M HCl(aq).
(a) before addition of any HCl
(b) after addition of 13.5 mL of HCl
(c) after addition of 21.5 mL of HCl
(d) after the addition of 35.0 mL of HCl
(e) after the addition of 43.5 mL of HCl
(f) after the addition of 50.0 mL of HCl