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| Acetic acid | CH3CO2H | 1.8x10-5 | ||
| Acetylsalicylic acid (aspirin) | HC9H7O4 | 3.0x10-4 | ||
| Aluminum ion | Al(H2O)43+ | 1.2x10-5 | ||
| Arsenic acid | H3AsO4 | 2.5x10-4 | 5.6x10-8 | 3.0x10-13 |
| Ascorbic acid | H2C6H6O6 | 7.9x10-5 | 1.6x10-12 | |
| Benzoic acid | C6H5COOH | 6.3x10-5 | ||
| Carbonic acid | H2CO3 | 4.2x10-7 | 4.8x10-11 | |
| Ferric ion | Fe(H2O)63+ | 4.0x10-3 | ||
| Formic acid | HCO2H | 1.8x10-4 | ||
| Hydrocyanic acid | HCN | 4.0x10-10 | ||
| Hydrofluoric acid | HF | 7.2x10-4 | ||
| Hydrogen peroxide | H2O2 | 2.4x10-12 | ||
| Hydrosulfuric acid | H2S | 1.0x10-7 | 1.0x10-19 | |
| Hypochlorous acid | HClO | 3.5x10-8 | ||
| Nitrous acid | HNO2 | 4.5x10-4 | ||
| Oxalic acid | H2C2O4 | 5.9x10-2 | 6.4x10-5 | |
| Phenol | C6H5OH | 1.0x10-10 | ||
| Phosphoric acid | H3PO4 | 7.5x10-3 | 6.2x10-8 | 3.6x10-13 |
| Sulfuric acid | H2SO4 | very large | 1.2x10-2 | |
| Sulfurous acid | H2SO3 | 1.7x10-2 | 6.4x10-8 | |
| Zinc ion | Zn(H2O)42+ | 2.5x10-10 | ||
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| Ammonia | NH3 | 1.8x10-5 | ||
| Aniline | C6H5NH2 | 7.4x10-10 | ||
| Caffeine | C8H10N4O2 | 4.1x10-4 | ||
| Codeine | C18H21O3N | 8.9x10-7 | ||
| Diethylamine | (C2H5)2NH | 6.9x10-4 | ||
| Dimethylamine | (CH3)2NH | 5.9x10-4 | ||
| Ethylamine | C2H5NH2 | 4.3x10-4 | ||
| Hydroxylamine | NH2OH | 9.1x10-9 | ||
| Isoquinoline | C9H7N | 2.5x10-9 | ||
| Methylamine | CH3NH2 | 4.2x10-4 | ||
| Morphine | C17H19O3N | 7.4x10-7 | ||
| Piperidine | C5H11N | 1.3x10-3 | ||
| Pyridine | C5H5N | 1.5x10-9 | ||
| Quinoline | C9H7N | 6.3x10-10 | ||
| Triethanolamine | C6H15O3N | 5.8x10-7 | ||
| Triethylamine | (C2H5)3N | 5.2x10-4 | ||
| Trimethylamine | (CH3)3N | 6.3x10-5 | ||
| Urea | N2H4CO | 1.5x10-14 |