For the titration of 75 mL of 0.10 M acetic acid with 0.10 M
NaOH, calculate the pH. For acetic acid, HC2H3O2, Ka = 1.8 x 10-5.
(a) before the addition of any NaOH solution. (b) after 25 mL of
the base has been added. (c) after half of the HC2H3O2 has been
neutralized. (d) at the equivalence point.