Solutions Question 350

Question: Freezing point of an aqueous solution is (0.186)C . Elevation of boiling point of the same solution is Kb=0.512C,Kf=1.86C , find the increase in boiling point.

Options:

A) 0.186C

B) 0.0512C

C) 0.092C

D) 0.2372C

Show Answer

Answer:

Correct Answer: B

Solution:

ΔTb=KbWBMB×WA×1000;

ΔTf=KfWBMB×WA×1000;

ΔTbΔTf=KbKf=ΔTb0.186=0.5121.86=0.0512C.



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