H9O4+ is often given as a reasonable configuration for the proton in solution. Using the Born equation and the equations for ion-dipole and ion-quadrupole interactions, show that the proton affinity of water must be about 180 kcal mole−1. The absolute individual heat of hydration of protons in water is −263 kcal mole−1.
KeywordsProton Transfer Proton Affinity Lithium Chloride Chloroacetic Acid Standard Free Energy Change
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