Consider the following data on some weak acids and weak bases: acid Ka base Kb
name formula name formula
hypochlorous acid HClO ×3.010^−8 pyridine C5H5N ×1.710^−9
hydrofluoric acid HF ×6.810^−4 ammonia NH3 ×1.810^−5

Use this data to rank the following solutions in order of increasing pH. In other words, select a '1' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on.

solution Ph
0.1 M C5H5NHCl ?
0.1 M NH4Br ?
0.1 M KClO ?
0.1 M NaI ?