Cars

Pure substances

A chemical substance is a particular class of homogeneous matter whose composition is fixed and chemically defined and is made up of the following entities: molecules, form units, and atoms.

Pure sbstances and Mixtures

Mixtures

A mixture is a material made up of two or more components united, but not chemically combined, a mixture does not occur in a chemical reaction and each of its components maintains its identity and chemical properties.

Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances.

It cannot be broken down or separated into new products.

Constant physical and chemical properties.

Pure substances are made up of a single element.

Sand and water.

Salt and water.

Sugar and salt.

Ethanol in water.

Air.

Soda.

Salt and pepper.

Solutions, colloids, suspensions.

It can be separated using different separation methods.

Mixtures have varying physical and chemical properties.

A mixture is a combination of two substances or elements.