Question

find molarity of ethyl alcohol solution in water if mole fraction of ethyl alcohol is 0.04​

Answer 1

Answer : The molality of solution is 2.315 mole/Kg.

Solution : Given,

Solute = Ethyl alcohol

Solvent = Water

Mole fraction of ethyl alcohol = 0.04

Molar mass of water = 18 g/mole

The relation between the mole fraction and the molality is,

where,

= Mole fraction of solute

= Molar mass of solvent

Now put all the given values in above formula, we get the molality.

Therefore, the molality of solution is 2.315 mole/Kg.