Basic chemistry help for students and teachers


Interactive Chemistry Worksheets for Students


Periodic table

Naming compounds

Basic formula

Simple compounds

Ionic compounds 1

Ionic compounds 2

Chemical suffixes

Old chemical names

Hydrocarbons - Alkanes

Alkanes, alkenes & alkynes

Alkanols to alkanoic acids


Common compounds

Common formula quiz

Acids, bases and salts

Covalent compounds

Printable worksheets



What is a mixture?

Mixtures are impure substances. They are made up of many different types of chemical substances. eg. Conglomerate rock is a good example of a mixture. Dirt is also a mixture of different things. You can easily see the different types of particles.

Examples of chemical mixtures are solutions, suspensions, solids. The following picture is a mixture of copper sulfate and water.

Chemists define mixtures as impure substances that can be separated into pure substances by physical process such as distillation, froth flotation, decanting, centrifuging, crystallization, fractional distillation, evaporation, filtration and chromatography.

Mixtures may be classified as homogeneous or heterogonous in nature.