Mixture

Definition

A mixture is a combination of two or more substances where each substance retains its own chemical identity and properties. Mixtures can be either homogeneous or heterogeneous based on the uniformity of their composition.

5 Must Know Facts For Your Next Test

1. Mixtures can be separated into their individual components by physical means such as filtration, distillation, and chromatography.
2. In a homogeneous mixture, the composition is uniform throughout, while in a heterogeneous mixture, the composition is not uniform.
3. Examples of homogeneous mixtures include saltwater and air; examples of heterogeneous mixtures include salad and granite.
4. The properties of a mixture are generally intermediate between those of its constituents.
5. Mixtures do not have a fixed composition; the proportion of components can vary.

Review Questions

• What are the main differences between homogeneous and heterogeneous mixtures?
• How can mixtures be separated into their individual components?
• Give two examples each for homogeneous and heterogeneous mixtures.

Related terms

Element:

A pure substance consisting of only one type of atom.

Compound:

A substance formed when two or more elements chemically combine in fixed proportions.

Solution:

A type of homogeneous mixture where one substance (solute) is dissolved in another (solvent).