Chloroform and acetone do not form an ideal liquid pair whereas acetone and benzene do form. Why?
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Chloroform and acetone do not form an ideal liquid pair whereas acetone and benzene do form. Why?
Explanation:
Mixture of chloroform and acetone forms a solution with negative deviation from Raoult's law.
1 Chloroform molecule is able to form hydrogen bond with acetone molecule.
2 This decreases the escaping tendency of molecules for each component.
3 Consequently the vapour pressure decreases resulting in negative deviation from Raoult's law.
Where as Acetone and benzene do as they forms a solution with positive deviation from Raoult's law
1 intermolecular attractive forces between the solute solvent molecules are weaker than those with solute-solute and solvent -solvent.
2 So increase in vapour pressure and result in positive deviation.
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