1- Determine the pH during the titration of 68.3 mL of 0.307 M acetic acid (K a = 1.810 -5 ) by 0.307 M NaOH at the following points.

1-
Determine the pH during the titration of 68.3 mL of 0.307 M acetic acid (Ka = 1.8×10-5) by 0.307 M NaOH at the following points.
(a) Before the addition of any NaOH ——–
(b) After the addition of 16.0 mL of NaOH- ——-
(c) At the half-equivalence point (the titration midpoint) ———
(d) At the equivalence point ———-
(e) After the addition of 102 mL of NaOH —–
2-
Determine the pH during the titration of 39.4 mL of 0.374 M triethylamine ((C2H5)3N , Kb = 5.2×10-4) by 0.374 M HClO4 at the following points.
(a) Before the addition of any HClO4
(b) After the addition of 16.2 mL of HClO4
(c) At the titration midpoint 
(d) At the equivalence point 
(e) After adding 55.6 mL of HClO4—-