What is the difference between Real and Ideal solution?

Answer 1

there is no interaction between the components in ideal solution whereas in non-ideal solution there is interactions between components. ideal solution obeys Raoult`s law whereas non-ideal solution do not obeys it. no volume change occurs on mixing due to no interaction in ideal solution whereas in non-ideal solution volume change occurs.

Answer 2

1) An Ideal solution follows the Raoult's law strictly where a Real solution shows deviation from the Raoult's law.

2) In an ideal solution

YAB = YAA

Whereas in a real solution YAB>YAA or YAB. Here γAB is the attractive force between A and B, and γAA between A and A. The molecules of the solvent and solute are represented by A and B respectively.

3) In the formation of an ideal solution no volume change occurs. If the volume of solvent is denoted by Vsolvent and the volume of the solute is denoted by Vsolute then

Vsolution = Vsolvent + Vsolute

Where Vsolution represents the volume of the solution.

In case of a real solution there is a volume change. So the above equation changes as following

Vsolution < Vsolvent + Vsolute or Vsolution > Vsolvent + Vsolute

4) There is no change of heat in the formation of an ideal solution. Therefore ΔH =0 for an ideal solution. But for a real solution there is a change of heat in the formation of the solution, so ΔH>0 or ΔH<0.

5) There is no change in gibs free energy (G) in case of an ideal solution. But in case of a real solution there might be a change in G. so ΔG = 0 for an ideal solution whereas ΔG>0 or ΔG<0 for a real solution.

These are the main differences between an Ideal and a Real solution.