In the titration of a solution of a weak monoprotic acid with a .1325M solution of of NaOH, the pH was halfway to the equivalence point was 4.42. In the titration of a second solution of the same acid, exactly twice as much of a 0.1325 M solution of NaOH was needed to reach the equivalence point. What was the pH half way to the equivalence point in this titration?