A mixture of chloroform () and acetone () shows a strong negative deviation from Raoult's law. What — Solutions and Colligative Properties Chemistry Question
Question
A mixture of chloroform ($CHCl_3$) and acetone ($CH_3COCH_3$) shows a strong negative deviation from Raoult's law. What is the primary molecular reason for this specific macroscopic behavior?
Answer: B
💡 Solution & Explanation
A negative deviation occurs when solute-solvent (A-B) interactions are stronger than the original solute-solute and solvent-solvent interactions. In the case of $CHCl_3$ and acetone, the hydrogen atom of chloroform forms a strong intermolecular hydrogen bond with the oxygen atom of the acetone carbonyl group, lowering the vapor pressure.
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