A 5.2 molal aqueous solution of methyl alcohol,

Question:

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

  1. 0.086 

  2. 0.050 

  3. 0.100

  4. 0.190


Correct Option: 1

Solution:

$5.2 \mathrm{~m} \mathrm{CH}_{3} \mathrm{OH}$ ie $5.2 \mathrm{~mol} \mathrm{CH} \mathrm{CH}_{3}$ present in $1 \mathrm{~kg}$ water

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