The titration of a 25 ml sample of 0.110 M HC2H3O2 with 0.130 M NaOH. Determine the following? the initial pH, the volume of added base required to reach the equivalence point, the pH at 5.00 ml of added base, the ph at one-half of the equivalence point, the ph at equivalence point. pH at equivalence point = 4.74 the volume of added base required to reach the equivalence point = 19.5 ml the initial pH = 2.85 the pH at the equivalence point ??? the pH at 5.00 mL of added base ph = ?