Solutions Question 382

Question: The freezing point of a solution composed of 10.0 g of KCl in 100 g of water is 4.5C . Calculate the van’t Hoff factor, i for this solution.

Options:

A) 2.50

B) 1.8

C) 1.2

D) 1.3

Show Answer

Answer:

Correct Answer: B

Solution:

ΔTf=iKfm m=100g/kg,H2O74.55,g/mol,(1.34,m)=1.8

i=ΔTfKfm=4.5oC(1.86oC/m),(1.34,m)=1.8



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