Methods of Separation Yeung tat ming Classification of Matters Pure substances Mixtures Matters.

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Separation of Mixtures

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Presentation transcript:

Methods of Separation Yeung tat ming 2001

Classification of Matters Pure substances Mixtures Matters

Pure substances Mixtures Air Oxygen gas 24 K Gold Distilled water Bleaching solution Town gas Seawater Tin-lead solder Petroleum salt

Matching II Mixture Solid/ liquid Solid/ solid Liquid/ liquid Liquid/ gas Gas/ gas Example Bleaching solution Tin-lead solder Town gas Seawater Petroleum Air

Salt + water Tin + lead Petrol + kerosene +... Chlorine + water Hydrogen + carbon monoxide +...

Solid/ liquid mixture: solution sugar + water --> sugar solution ______ + ______ --> solution (solid) (liquid) Solute + ______ --> solution Solute + solvent --> solution

Sugar solution Solvent: Water molecules Solute: Sugar molecules

Classification of Matters Pure substances Mixtures Matters separation methods

Classification of Matters Pure substances: Sugar & water Mixtures: Sugar solution Matters separation methods Evaporation & Distillation

DECANTATION Decantation is a quick but rough method of separating a mixture of a liquid and a much denser undissolved solid.

liquid solid liquid glass rod Decantation

FILTRATION An insoluble solid is usually separated from a liquid by filtration.

Filtration glass rod mixture folded filter paper residue filter funnel filtrate stand

Filtration

A water treatment works.