1.

The vapour pressure of H_(2)O is 23.756mmHg at 25^(@)C. What is the vapour pressure of a solution of 28.5g of sucrose, C_(12)H_(22)O_(11)(342) in 100g of H_(2)O ?

Answer»

<P>

SOLUTION :Mole of sucrose `=(28.5)/(342)=0.0834`
MOLES of `H_(2)O=(100)/(18)=5.55`
`:.` mole fraction of SOLUTE `=(0.0834)/(0.0834+5.55)`
`=0.0148`
We have,
`(p^(0)-p)/(p^(0))=` mole fraction of solute……..(Eqn. 1)
`(23.756-p)/(23.756)=0.0148`
`p=23.404mm`


Discussion

No Comment Found

Related InterviewSolutions