JSS 2: MIXTURES

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       A mixture is a substance that contains two or more constituents that can easily be separated by physical methods. 
Examples of mixtures are:
Air, Soil, Urine, Palm wine, Crude oil, Sea water, Blood, Alloy, etc

              Types of Mixtures
The two types of mixtures are:
I. Homogeneous Mixtures
II. Heterogeneous Mixtures

        A. Homogeneous Mixtures
Homogeneous Mixtures have a uniform composition throughout. The different components cannot be easily seen. They are also called solutions.
Examples:
Sugar dissolved in water
Air
Alcohol in water

         B. Heterogeneous Mixtures

Heterogeneous Mixtures have a non-uniform composition. The components can be easily seen and separated.
Examples:
Sand and water
Oil and water
Salt and pepper

           Properties of Mixtures
1. Components are not chemically combined.
2. Components can be separated by physical methods.
3. Composition is not fixed.
4. No energy (heat) change during formation.
5. Each component retains its properties.

Differences between mixture and compound 
                 Separation of Mixtures
   Some of the methods used in the separation of Mixtures includes:
I. Filtration
II. Evaporation to dryness 
III. Distillation
IV. Decantation
V. Magnetic Separation
VI. Sublimation
VII. Chromatography
VIII. Centrifugation etc.

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