biophysic course

The solutions

Definition of solution

  • A solution is a homogeneous mixture consisting of two or more substances (molecules, atoms, or ions).

  • A solution contains substances in small quantities called a solute and another in a large quantity called a solvent.

  • In a solution, the solute is dispersed uniformly throughout the solvent.

Classification of Solutions

The terms dilute and concentrate are used when referring to the concentration of solutions.

Concentrated solutions

Dilute solutions are solutions that contain a relatively large amount of dissolved solute.

Dilute solutions

Dilute solutions are solutions that contain a relatively small amount of dissolved solute.

Ideal Solution

Ideal solutions are expressed when the interaction energies are equal between solvent-solvent, solvent-solute, and solute-solute. solution (A-B) is ideal if the intermolecular forces in the solution are exactly equal to the intermolecular forces in the two pure substances A and B). Dilute solutions are called ideal solutions.

Non-ideal Solution

Non-ideal solutions are expressed when the interaction energies are unequal between solvent-solvent, solvent-solute, and solute-solute. solution (A-B) is non-ideal if the intermolecular forces in the solution are exactly unequal to the intermolecular forces in the two pure substances A and B).

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