Separation of mixtures and purification of chemical substances
Our summary: Elements, compounds and mixtures, how to tell pure from impure substances, and the methods used to separate mixtures.
Contents
- Elements, compounds and mixtures
- Chemical and physical changes
- Pure and impure substances
- Boiling, density, freezing and melting points
- Separation processesJAMB note: Evaporation, simple and fractional distillation, sublimation, re-crystallization, paper and column chromatography, simple and fractional crystallization, magnetization, decantation, filtration and centrifugation.
Objectives
- distinguish between elements, compounds and mixture;
- differentiate between chemical and physical changes;
- distinguish between pure and impure substances;
- use boiling and melting points as criteria for purity of chemical substances;
- identify the properties of the components of a mixture;
- specify the principle involved in each separation method; and
- apply the basic principle of separation processes in everyday life.
