Where can I find pK_a's on the Web?

The Common Compound Library available on this site contains K_a values for most common monoprotic and polyprotic acids, along with other physical properties.

Advanced Chemical Development, Inc. also offers ILAB, an online service that includes a pK_a database containing about 9000 compounds. You can also use their software to predict pK_a's from molecular structures.

You can also find acid pK_a data using Cambridge Software's ChemFinder.

Author: Fred Senese senese@antoine.frostburg.edu