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Unformatted text preview: van der Waals forces (sometimes the hydrogen bonding forces are also included with this group) Attractive forces between neutral and charged (ionic) molecules ion-dipole forces Note that all of these forces will be electrostatic in nature Ion-dipole Involves an interaction between a charged ion and a polar molecule (i.e. a molecule with a dipole ) Cations are attracted to the negative end of a dipole Anions are attracted to the positive end of a dipole The magnitude of the interaction energy depends upon the charge of the ion ( Q ), the dipole moment of the molecule ( u ) and the distance ( d ) from the center of the ion to the midpoint of the dipole Ion-dipole forces are important in solutions of ionic substances in polar solvents (e.g. a salt in aqueous solvent)...
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