Calculate the molarity of a soln of ethanol in watr in wich d mole fractn of etanol is 0.040??

Dear Student,

The question can be solved by following approach. Let the number of moles of water be x.Let the number of moles of ethanol are y.

Then:

y/(x+y) = 0.04

or

25 y= x+ y

or

y = x/24

Now weight of water= 18 x grams

using Volume =Mass/Density

Volume of water = 18 x /1000

Hence molarity of solution is :

y/Volume of water=(x 1000) /(2418 x)=2.315 M