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The proton affinity (PA, Epa) of an anion or of a neutral atom or molecule is the negative of the enthalpy change in the reaction between the chemical species concerned and a proton in the gas phase:
Hydration, Acid/base chemistry & Difference from pKa
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proton affinity pka base gas phase energy acid kj mol epa basicity negative molecule ion aqueous gas-phase enthalpy anion hydration
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Proton affinity | is a | gas-phase basicity | 0.90 | text |
| Proton affinity | is a | intrinsic property of the molecule | 0.90 | text |
| Proton affinity | related to Acid/base chemistry | The | 0.60 | section |
| Proton affinity | related to Acid/base chemistry | Epa | 0.60 | section |
| Proton affinity | related to Difference from pKa | Both | 0.60 | section |
| Proton affinity | related to Difference from pKa | While | 0.60 | section |
| Proton affinity | related to Difference from pKa | DMSO | 0.60 | section |
| Proton affinity | related to Difference from pKa | Large | 0.60 | section |
| Proton affinity | related to Difference from pKa | In | 0.60 | section |
| Proton affinity | related to Difference from pKa | Therefore | 0.60 | section |
| Proton affinity | related to Difference from pKa | Proton | 0.60 | section |
| Proton affinity | related to Hydration | Proton | 0.60 | section |
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