Dissociation Constants for Acids at 25 oC a (or Ka1) K a2

Dissociation Constants for Acids at 25 oC. Name Formula Ka (or Ka1) Ka2 Ka3 Acetic HC2H3O2 1.8 x 10 –5 Arsenic H3AsO4 5.8 x 10 –3 1.1 x 10–7 3.2 x 10–12 Arsenous H3AsO3 5.1 x 10 –10 Ascorbic H2C6H6O6 8.0 x 10 –5 1.6 x 10–12 Benzoic HC7H5O2 6.5 x 10 –5 Boric H3BO3 5.8 x 10 –10 1.8 x 10–13 1.6 x 10–14 Butanoic HC4H7O2 1.5 x 10 –5