• HOMEWORK: Methods of Separating Mixtures

•  First: Read Chapter 3 sections 3 and 4 (Mixtures of Matter and Elements and Compounds).

• Second: Read this file.• Third: Exemplify the use of methods of

separating mixtures in: recycling processes, purification of water, air and solids. Before writing your examples, do research and cite your sources.

• DUE DATE: Wednesday 24th, 2011

METHODS OF SEPARATING MIXTURES

August 21st, 2011

Methods of separating mixtures

• Filtration• Decantation• Distillation• Paper chromatography• Centrifugation• Magnetization

Filtration

• Separates a solid from a fluid (liquid or gas)• Uses a porous barrier: filter paper• Use gravity or gravity enhanced by a vacuum.

Decantation

• Used to separate immiscible liquids• Done by carefully pouring one of the

solutions into another container• Used to separate insoluble solids

Distillation

• Mostly used for homogeneous mixtures• Separates substances by their boiling points• Condense the gas into a liquid and collect

Paper Chromatography

• Composed of a mobile phase and a stationary phase• Mobile phase: usually a gas or a liquid that

travels through the stationary phase• Stationary phase: chromatography paper

Centrifugation

• Uses the centrifugal force in order to sediment compounds in a mixture.