A 25.0-mL sample of 0.100 M propanoic acid (HC3H5O2, Ka = 1.3 10-5) is titrated with 0.100 M NaOH solution. Calculate the pH after the addition of the following amounts.
(a) 0.0 mL
(b) 4.0 mL
(c) 8.0 mL
(d) 12.5 mL
(e) 20.0 mL
(f) 24.0 mL
(g) 24.5 mL
(h) 24.9 mL
(i) 25.0 mL
(j) 25.1 mL
(k) 26.0 mL
(l) 28.0 mL
(m) 30.0 mL