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Values of pK in ordinary water and in heavy water at the temperature of the minimum pK value
| Water | Deuterium oxide | ||||
|---|---|---|---|---|---|
| tmin | pKmin | tmin | pKmin | ΔpKmin | |
| Acetic acid | 22.4 | 4.756 | 32.0 | 5.310 | 0.554 |
| Deuterioacetic acid | 22.9 | 4.771 | 32.4 | 5.323 | 0.552 |
| Phosphoric acid (2nd step) | 42.7 | 7.180 | 47.7 | 7.744 | 0.564 |
| “Self-dissociation” constant | 239 | 11.382 | 221 | 12.356 | 0.974 |
The temperature of maximum K value (or minimum pK value) is expressed in degrees Celsius. All pK values are on the molality scale.
