Chemistry - Class Twelve

Solutions

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Solution of NCERT In Text Questions-2.8

Question - 2.8 - The vapour pressure of pure liquids A and B are 450 and 700 mm Hg respectively, at 350 K . Find out the composition of the liquid mixture if total vapour pressure is 600 mm Hg. Also find the composition of the vapour phase.

Solution:

Given,

Solutions class 12 chemistry - NCERT In Text Solution44

For liquid A and B,

From Rault❜s Law,

Solutions class 12 chemistry - NCERT In Text Solution45
Solutions class 12 chemistry - NCERT In Text Solution46

Now, In vapour phase,

Mole fraction of liquid A

Solutions class 12 chemistry - NCERT In Text Solution47

And mole fraction of liquid B

Solutions class 12 chemistry - NCERT In Text Solution48

Thus, composition in liquid phase, is 0.4 and 0.6

And that in vapour phase, is 0.3 and 0.7

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Topics covered in this chapter of Solutions

1. Solutions

2. Types of Solutions

3. Solutions - Concentration

4. Solution of NCERT In Text Questions

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