| Conjugate Acid | pKa |
| Ammonia | |
| Alcohol | |
| Water | |
| Thiol | |
| Trialkylammonium Ion | |
| Ammonium | |
| Hydrocyanic Acid | |
| Hydrosulfuric Acid | |
| Carboxylic Acid | |
| | Conjugate Acid | pKa |
| Hydrofluoric Acid | |
| p-toluene-sulfonic acid | |
| hydronium ion | |
| sulfuric acid | |
| hydrochloric acid | |
| hydrobromic acid | |
| Hydroiodic Acid | |
| Perchloric Acid | |
|