Mixtures, Solutions and Suspensions

Mixtures vs. solutions vs. suspensions.

Mixtures

A mixture is a combination of substances which are not chemically joined together.

Mixtures have the same properties as their components
There is no fixed proportion between the components
The components can be separated from the mixture

Examples

sugar and salt
air with nitrogen and oxygen

Solutions

A solution is a homogeneous mixture in which one substance (solute) is dissolved in another substance (solvent).

The components in a solution may not be separated from the solution by leaving it to stand, or by filtration

If a material dissolves in a liquid the material is said to be soluble. A solution is saturated if no more solute can be dissolved with temperature remaining constant.

Examples

salt in sea water

Suspensions

A suspension is a mixture of liquids with particles of a solid which may not dissolve in the liquid.

The solid may be separated from the liquid by leaving it to stand, or by filtration

Examples

sand in water

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