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Home / Doubts and Solutions/NEET/Physical Chemistry Ii

Q) Please explain the solution of this problem

Asked by tirumalasandeep 12th April 2017, 3:05 PM
Answered by Expert
Answer:

From Raoult’s law for a non-volatile solute like urea,

Ps/Po = X1

22.98/23.75 =X1= 0.9675

Mole fraction of H2O = 0.9875

Mole fraction of urea= (1- 0.9875)

                                       =0.0324

Molality = No. of moles of urea/Mass of water in kg = (0.0324/ (0.9875x18) x 1000 = 1.82m

 

Answered by Expert 12th April 2017, 7:37 PM
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