A list of dissociation constants
| Compound Name | pKa value | Σ Δ (ΔHo) | Other common names |
| Ammonium NH4+ | 9.24 | 52.43 kJ | |
| Hydrogen Sulphide H2S | 7.01 | kJ | |
| Carbonic Acid H2CO3 | kJ | ||
| Bicarbonate HCO3- | 10.198 | kJ | |
| Carbon dioxide CO2 | 6.318 | kJ | |
| Phosphor acid H3PO4 | 2.06 | kJ | |
| H2PO4- | 7.12 | kJ | |
| HPO42- | 12.3 | kJ | |
| Methyl mercaptan CH3SH | 10.3 | kJ | |