Values For Common Substances
There are multiple techniques to determine the pKa of a chemical, leading to some discrepancies between different sources. Well measured values are typically within 0.1 units of each other. Data presented here were taken at 25 °C in water. More values can be found in thermodynamics, above.
| Chemical Name | Equilibrium | pKa |
|---|---|---|
| B = Adenine | BH22+ BH+ + H+ | 4.17 |
| BH+ B + H+ | 9.65 | |
| H3A = Arsenic acid | H3A H2A− + H+ | 2.22 |
| H2A− HA2− + H+ | 6.98 | |
| HA2− A3− + H+ | 11.53 | |
| HA = Benzoic acid | HA H+ + A− | 4.204 |
| HA = Butanoic acid | HA H+ + A− | 4.82 |
| H2A = Chromic acid | H2A HA− + H+ | 0.98 |
| HA− A2− + H+ | 6.5 | |
| B = Codeine | BH+ B + H+ | 8.17 |
| HA = Cresol | HA H+ + A− | 10.29 |
| HA = Formic acid | HA H+ + A− | 3.751 |
| HA = Hydrofluoric acid | HA H+ + A− | 3.17 |
| HA = Hydrocyanic acid | HA H+ + A− | 9.21 |
| HA = Hydrogen selenide | HA H+ + A− | 3.89 |
| HA = Hydrogen peroxide (90%) | HA H+ + A− | 11.7 |
| HA = Lactic acid | HA H+ + A− | 3.86 |
| HA = Propionic acid | HA H+ + A− | 4.87 |
| HA = Phenol | HA H+ + A− | 9.99 |
| H2A = L-(+)-Ascorbic Acid | H2A HA− + H+ | 4.17 |
| HA− A2− + H+ | 11.57 |
Read more about this topic: Acid Dissociation Constant
Famous quotes containing the words values and/or common:
“The vulgar crowd values friends according to their usefulness.”
—Ovid (Publius Ovidius Naso)
“There ought to be an absolute dictatorship ... a dictatorship of painters ... a dictatorship of one painter ... to suppress all those who have betrayed us, to suppress the cheaters, to suppress the tricks, to suppress mannerisms, to suppress charms, to suppress history, to suppress a heap of other things. But common sense always gets away with it. Above all, let’s have a revolution against that!”
—Pablo Picasso (1881–1973)