Colligative properties

[JoyantBuoyant]

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Okay, I saw this post somewhere else but it didnt really answer the question.

For colligative properties I know it just depends on the number of particles in the solvent rather type.

But for boiling point and vapor pressure lets say if the solute and the solvent can hydrogen bond then the intermolecular forces would be greater causing deviations from Raoults law and the notion that colligative properties only depend on number and NOT type.


Can someone clarify the mindset I should have about this when entering the test saturday?
thanks

 

[JoyantBuoyant]

in summary... does colligative properties depend on number only or also type ?

 

[dariidar]

in summary... does colligative properties depend on number only or also type ?

Wikipedia says that the Van't Hoff factor depends on how well the solute dissociates. The example they give is i = 1.9 for NaCl and i = 2.3 for calcium chloride. Intermolecular forces probably play a huge role in colligative properties.

however, I don't think they'd expect us to know that on the MCAT.