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Separation techniques
- 1. Methods of SeparatingMixtures • Magnet • Filter • Decant • Evaporation • Centrifuge • Chromatography • Distillation
- 2. Filtration separates a liquid from a solid Zumdahl,Zumdahl, DeCoste, World of Chemistry 2002, page 40 Mixture of solid and liquid Stirring rod Filtrate (liquid component of the mixture) Filter paper traps solid Funnel
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- 5. Chromatography: Separates substances onthe basis of differences in solubility in a solvent.
- 6. Setup to heata solution Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 42 Ring stand Beaker Wire gauze Ring Bunsen burner
- 7. The solution isboiled and steam is driven off. Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 39
- 8. Distillation Apparatus Salt remainsafter all water is boiled off. Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 39
- 9. No chemical changeoccurs when salt water is distilled. Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 40 Saltwater solution (homogeneous mixture) Distillation (physical method) Salt Pure water
- 10. Separation of asand-saltwater mixture. Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 40
- 11. Centrifugation • Spin samplevery rapidly: denser materials go to bottom (outside) • Separate blood into serum and plasma – Plasma = less dense – Erythrocytes = red blood cells • Check for anemia (lack of iron)
- 12. Water Molecules Zumdahl, Zumdahl,DeCoste, World of Chemistry 2002, page 8
- 13. The decomposition oftwo water molecules. 2 H2O O2 + 2 H2 Electric current Water molecules Diatomic Diatomic oxygen molecule hydrogen molecules+