Solutions Question 399

Question: The relative lowering of vapour pressure of aqueous solution containing a non-volatile solute is 0.0125. The molality of the solution is

Options:

A) 0.70

B) 0.50

C) 0.80

D) 0.40

Show Answer

Answer:

Correct Answer: A

Solution:

ppp=X1=0.0125= mole fraction of solute

Mole fraction and molarity are related as

1X1=1000M×m 10.01251=100018×m m=0.70



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