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:
“We must be physicists in order ... to be creative since so far codes of values and ideals have been constructed in ignorance of physics or even in contradiction to physics.”
—Friedrich Nietzsche (1844–1900)
“No testing has overtaken you that is not common to everyone. God is faithful, and he will not let you be tested beyond your strength, but with the testing he will also provide the way out so that you may be able to endure it.”
—Bible: New Testament, 1 Corinthians 10:13.