Question

A 95 mass precent solution of ethanol is further diluted with water. If the mole fraction of ethanol in diluted solution is 0.25, what is the mole fraction of waer in the diluted solution. Is it still an ideal solution

Answer 1

Correct Answer - Solution is not ideal
The mole fraction of ethanol = 0.25
The mole fraction of water = 1-0.25=0.75
In this solution. Water is solute and alcohol is solvent. Upon dilution, the mass present of water become more than 5% This means that the solution is no longer dilute or ideal.