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  4. A 5.2 molal aqueous solution of methyl alcohol, CH 3 OH is supplied. What is the mole fraction of methyl alcohol in the solution?

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Q. A 5.2 molal aqueous solution of methyl alcohol, $CH _{3} OH$ is supplied. What is the mole fraction of methyl alcohol in the solution?

AIEEEAIEEE 2011

Solution:

$x =\frac{\text { No. of moles of compound }}{\text { Total no. of mole of solution }}$

For $1 kg$ solvent

$x=\frac{5.2}{55.5+5.2} =\frac{5.2}{60.7}=0.086$