Ions Interact With Water Molecules Via Ion Dipole Interactions Stronger The Ion

Ions interact with water molecules via ion-dipole interactions. Stronger the ion-dipole interaction (lower the potential energy/enthalpy) greater the thermodynamic stability. Let’s think about the relationship between charge density of the ion and the strength of the ion-dipole interactions

Arrange the following ions from weakest (1) to strongest (4) ion-dipole interactions

1 = weakest, 4 = strongest

I-，Br-，F-，Cl-

 

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