When sodium chloride (NaCl) dissolves in water, the positive poles of the water molecules are attracted to the negative chloride ions, and the negative poles of the water molecules are attracted to the positive sodium ions.

These attractions occur between water molecules and dissolved ions, so they are intermolecular forces. Specifically, the polar water molecules are attracted to the oppositely charged sodium and chloride ions. Intramolecular forces hold atoms together within a molecule, such as the O–H bonds within water.

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