Name: Solid Solutions
Uploaded: 2019-07-19
Duration: 2 min 56 s
Description: Solutions can be categorized as solid, liquid, and gaseous based on the physical states of solvents and solutes. In this video, let's learn about solid solutions.

Question

State Raoult's law. Using the law, how would you distinguish between ideal and non-ideal solutions?

Accepted Answer

Raoult’s law in its general form can be stated as, for any solution the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction.

The solutions which obey Raoult’s law over the entire range of concentration are known as ideal solutions. For an ideal solution, the intermolecular attractive forces between the solute-solvent molecules are equal to those between the solute-solute and solvent-solvent molecules.

If a solution does not obey Raoult’s law over the entire range of concentration, then it is called non-ideal solution. The vapour pressure of such a solution is either higher or lower than that predicted by Raoult’s law. If it is higher, the solution exhibits positive deviation and if it is lower, it exhibits negative deviation from Raoult’s law.

For a non-ideal solution, the intermolecular attractive forces between the solute-solvent molecules are not equal to those between the solute-solute and solvent-solvent molecules.

State Raoult's law. Using the law, how would you distinguish between ideal and non-ideal solutions?

Important Questions on Solutions

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