Q. The degree of dissociation of in dilute aqueous solution containing 7.0 g of salt per 100.0 g of water at is . If the vapour pressure of water at is 760 mmHg, the vapour pressure of the solution is

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Solution:

Moles of present in 100.0 g of water
Since dissociation is 70%, the total number of particles

Also, moles of solvent
Applying Raoult’s law

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