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Methods of Separating Mixtures• Magnet• Filter• Decant• Evaporation• Centrifuge• Chromatography• Distillation
Filtrationseparatesa liquidfrom asolidZumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 40Mixture ofsolid andliquid...
Paper Chromatography
Chromatography:Separates substances on the basis ofdifferences in solubility in a solvent.
Setup to heat a solutionZumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 42Ring standBeakerWire gauzeRingBunsen bu...
The solution is boiled and steamis driven off.Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 39
Distillation ApparatusSalt remains after all water isboiled off.Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 39
No chemical change occurswhen salt water is distilled.Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 40Saltwater...
Separation of a sand-saltwatermixture.Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 40
Centrifugation• Spin sample very rapidly:denser materials go tobottom (outside)• Separate blood into serumand plasma– Plas...
Water MoleculesZumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 8
The decomposition of two watermolecules.2 H2O  O2 + 2 H2ElectriccurrentWatermoleculesDiatomic Diatomicoxygen molecule hyd...
Separation techniques
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Separation techniques

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Separation techniques

  1. 1. Methods of Separating Mixtures• Magnet• Filter• Decant• Evaporation• Centrifuge• Chromatography• Distillation
  2. Filtrationseparatesa liquidfrom asolidZumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 40Mixture ofsolid andliquid StirringrodFiltrate (liquidcomponentof the mixture)Filter papertraps solidFunnel
  3. Paper Chromatography
  4. Chromatography:Separates substances on the basis ofdifferences in solubility in a solvent.
  5. Setup to heat a solutionZumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 42Ring standBeakerWire gauzeRingBunsen burner
  6. The solution is boiled and steamis driven off.Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 39
  7. Distillation ApparatusSalt remains after all water isboiled off.Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 39
  8. No chemical change occurswhen salt water is distilled.Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 40Saltwater solution(homogeneous mixture)Distillation(physical method)SaltPure water
  9. Separation of a sand-saltwatermixture.Zumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 40
  10. Centrifugation• Spin sample very rapidly:denser materials go tobottom (outside)• Separate blood into serumand plasma– Plasma = less dense– Erythrocytes = red blood cells• Check for anemia (lack of iron)
  11. Water MoleculesZumdahl, Zumdahl, DeCoste, World of Chemistry 2002, page 8
  12. The decomposition of two watermolecules.2 H2O  O2 + 2 H2ElectriccurrentWatermoleculesDiatomic Diatomicoxygen molecule hydrogen molecules+
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