Solvent Species | Water | Ethanol | Acetone | Remarks |
| HF | 3.1 | 5.0 | ~5.5 | Acidity decrease in organic solvents |
| HNO3 | −1.0 | −1.0 | ~ −1 | Strong acid in the examined solvents |
| Metallic cations arising from alloys indicated in Table 1. | *In absence of complexing ligands, all the cations could react with bases for pH ranges from 2 to 8. *The acidic behavior of the cations is strongly dependent 1) of their complexation, mainly by the fluoride ion, and 2) by the media used. | |||