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Melting Point of Ice As It Relates to Intermolecular Forces

Question asked by Em Dee on Sep 7, 2018
Latest reply on Sep 15, 2018 by Alex Madonik

Hi, I was taught that increasing the strength of intermolecular forces also increases the melting point of a solid. If this is true, then why does salt decrease the melting point of ice? I know that salt will dissociate into Na+ and Cl- ions and that these ions will form ion-dipole interactions with water. Moreover, ion-dipole interactions are stronger than hydrogen bonding so should this not increase the melting point of ice?

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