1. Methods of Separation Yeung tat ming 2001

2. Classification of Matters Pure substances Mixtures Matters

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

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

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

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

7. Sugar solution Solvent: Water molecules Solute: Sugar molecules

8. Classification of Matters Pure substances Mixtures Matters separation methods

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

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

12. liquid solid liquid glass rod Decantation

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

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

15. Filtration

16. A water treatment works.