Sciencemadness Discussion Board

Question regarding colligative properties: Depression in freezing point..

sankalpmittal - 10-7-2013 at 05:12

A mixture which contains 0.55 grams of camphor and 0.045 grams of an organic solute freezes at 157oC. The solute contains 93.46% of Carbon and 6.54% of Hydrogen by weight. What is the molecular formula of the compound ?

Given:

Molal freezing depression constant Kf of camphor = 37.7
Freezing point of camphor=178.4oC

I just do not want full solution. What I want are the hints in the correct directions. Please help !!

Thanks in advance.. :)


Metacelsus - 10-7-2013 at 07:03

1) Calculate the molality of the solution.
2) Calculate the molar mass of the solute.
3) Use the percentages given to find the formula.