Why is the solubility of haloalkanes in water very low?
(N/A) Haloalkanes are polar molecules,but they are not able to form hydrogen bonds with water molecules.
For a substance to dissolve in water,the energy released during the formation of new solute-solvent interactions must be sufficient to overcome the energy required to break the existing solute-solute and solvent-solvent interactions.
In the case of haloalkanes,the new intermolecular attractions between haloalkanes and water are much weaker than the strong hydrogen bonds existing between water molecules.
Therefore,the energy required to break the hydrogen bonds in water is not compensated by the energy released during the formation of new interactions,resulting in very low solubility.
For a substance to dissolve in water,the energy released during the formation of new solute-solvent interactions must be sufficient to overcome the energy required to break the existing solute-solute and solvent-solvent interactions.
In the case of haloalkanes,the new intermolecular attractions between haloalkanes and water are much weaker than the strong hydrogen bonds existing between water molecules.
Therefore,the energy required to break the hydrogen bonds in water is not compensated by the energy released during the formation of new interactions,resulting in very low solubility.
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