Question

an ideal solution is that which follows _____ ?​

Answer 1

Answer:

● An ideal solution is that which vapour pressure follows Raoult's Law.

Answer 2

An ideal solution is that which follows Raoult's law.

About Raoult's law:

• The vapor pressure of a solvent above a solution, according to Raoult's law, is equal to the vapor pressure of the pure solvent at the same temperature scaled by the mole fraction of the solvent present:
• $P_{solution} =x_{solvent} P^{0}_{solvent} .$
• Where,
• $P_{Solution}$ = vapor pressure of the solution
• $x_{solvent}$  = mole fraction of the solvent
• $P^{0}_{solvent}$ = vapor pressure of the pure solvent

Ideal solutions:

• An ideal solution is one in which, regardless of temperature or concentration, each component abides by Raoult's law.
• While the two components are mixed, or when ΔVmixing, there will be no change in volume.
• When the two components are combined, or when there is ΔHmixing there will be no change in enthalpy.
• Example- Benzene+Toluene

Non-Ideal solutions:

• Over the whole concentration range, neither Raoult's law nor Henry's law can be used to describe non-ideal solutions.
• Unsatisfactory results can happen in two ways:
• when the intermolecular interactions between the molecules of the solute and the solvent are weaker than those between molecules that are comparable (of the same kind).
• when the intermolecular forces between molecules are stronger than the forces between molecules that are comparable.

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