Year 7 Chemistry
Separation of Mixtures
A chemical mixture is a collection of molecules or atoms of different types. A mixture is distinguished from a pure substance, which has constant composition (is composed of a only one type of molecule or atom), and a unique set of physical properties (no matter how large or small a sample is observed). The properties of a mixture depend not only on the types of substances that compose it, but also on their relative amounts; the composition of a mixture is not constant. The separation of mixtures is big business, and separation science is a subdivision of chemistry.
Mixture, chemical. (2014). In K. L. Lerner & B. W. Lerner (Eds.), The Gale Encyclopedia of Science (5th ed.). Farmington Hills, MI: Gale. Retrieved from http://link.galegroup.com/apps/doc/CV2644031450/SCIC?u=61wa_corpus&sid=SCIC&xid=7eb8d1d1
Wiley Textbook Separating Mixtures
- Separating MixturesAny substance that is not a mixture is a pure substance.
When coloured watercolours are applied to paper, sometimes the colours in the inks separate. This means that each ink is made up of separate colours. This technique is called chromatography. What other techniques can be used to separate mixtures?
Separating Mixtures
Mixtures and Separations
Mixtures and Separations
Separating Mixtures
The individual substances in a mixture can be separated using different methods, depending on the type of mixture. These methods include filtration, evaporation, distillation and chromatography.
- BBC Bitesize - KS3 Chemistry - Separating MixturesUse this BBC Bitesize resource for test revision and practice.
BBC Bitesize. (n.d.). Separating Mixtures. Retrieved from https://www.bbc.com/bitesize/guides/zgvc4wx/revision/1
Other Resources
- The Separation of MixturesThis extract considers mixtures at a molecular level, and provides some additional recommended articles that may be of interest.
- Methods for Separating MixturesLearn some more about describing techniques for separating mixtures with this resource provided by Lumen Learning.
