| Compound | Ka | Compound | Ka |
| HF | 3.5 · 10-4 | o-FC6H4COOH | 5.4 · 10-4 |
| HOCl | 3.0 · 10-8 | m-FC6H4COOH | 1.4 · 10-4 |
| HClO2 | 1.0 · 10-2 | p-FC6H4COOH | 7.2 · 10-5 |
| H2S | 5.7 · 10-8, 1.2 · 10-15 | o-ClC6H4COOH | 1.2 · 10-3 |
| H2SO3 | 1.3 · 10-2, 5.6 · 10-8 | m-ClC6H4COOH | 1.5 · 10-4 |
| H2Se | 2.0 · 10-4, 1.0 · 10-11 | p-ClC6H4COOH | 1.0 · 10-4 |
| H2Te | 2.5 · 10-3, 5.0 · 10-11 | o-NO2C6H4COOH | 7.0 · 10-3 |
| HNO2 | 4.6 · 10-4 | m-NO2C6H4COOH | 3.4 · 10-4 |
| HCN | 4.9 · 10-10 | p-NO2C6H4COOH | 3.9 · 10-4 |
| H2CO3 | 4.2 · 10-7, 4.8 · 10-11 | p-CH3C6H4COOH | 4.2 · 10-5 |
| H2C2O4 | 5.9 · 10-2, 6.4 · 10-5 | p-CH3O2C6H4COOH | 3.4 · 10-5 |
| H3PO4 | 7.5·10-3, 6.2·10-8, 2.2·10-13 | p-H2NC6H4COOH | 1.2 · 10-5 |
| H2SO4 | - , 1.2 · 10-2 | C2H5SH | 2.5 · 10-11 |
| HOOCCH2COOH | 1.5 · 10-3, 2.0 · 10-6 | BrCH2COOH | 1.4 · 10-3 |
| HCOOH | 1.8 · 10-4 | ICH2COOH | 7.6 · 10-4 |
| CH3COOH | 1.8 · 10-5 | CH3CH2COOH | 1.3 · 10-5 |
| FCH2COOH | 2.2 · 10-3 | C6H5COOH | 6.5 · 10-5 |
| F2CHCOOH | 6.0 · 10-2 | o-C6H4(COOH) 2 | 1.3 · 10-3, 3.9 · 10-6 |
| F3CCOOH | 6.0 · 10-1 | C6H5OH | 1.3 · 10-10 |
| ClCH2COOH | 1.4 · 10-3 | o-NO2C6H4OH | 6.8 · 10-8 |
| Cl2CHCOOH | 3.3 · 10-2 | m-NO2C6H4OH | 5.3 · 10-9 |
| Cl3CCOOH | 2.0 · 10-1 | p-NO2C6H4OH | 7.0 · 10-8 |
