A mixture is a combination of two or more substances that are not chemically the same. The composition of a mixture is variable. In a mixture, the components are present in any proportion, and they can be identified visually within the mixture. In a mixture, the individual components retain their own identities.

Examples of Mixtures

Crude oil: A mixture of organic compounds (mainly hydrocarbons)
Seawater: A mixture of various salt and water.
Air: A mixture of various gases like oxygen, carbon dioxide, nitrogen, argon, neon, etc.
Ink: A mixture of coloured dyes.
Gunpowder: A mixture of sulphur, potassium nitrate and carbon.

The properties of a mixture are the same as the properties of individual compounds. Physical methods may separate individual components of a mixture. For example, a magnet can be used to separate iron from a mixture of iron and sulphur.

Mixtures can be homogeneous mixtures or heterogeneous mixtures.

Homogeneous mixtures: Homogeneous mixtures have uniform composition and appearance throughout. A homogeneous mixture is also called a true solution.
Examples: Sugar solution, ocean water, soft drinks, etc.

Heterogeneous mixtures: A mixture of sand mixed with salt is an example of a heterogeneous mixture. Heterogeneous mixtures possess different properties and compositions in various parts, i.e. the properties are not uniform throughout the mixture.
Examples: A mixture of iron and sulphur, a mixture of sand and table salt, etc.

Watch this video to learn more about chemistry.

Requirements for this Science Experiment

⦁ Copper sulphate ⦁ Copper sulphate ⦁ Distilled water ⦁ Spatula ⦁ Glass rod