Mixutres2008

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  • Mixutres2008

    1. 1. Mixutres
    2. 2. Objectives <ul><li>Describe the properties of mixtures </li></ul><ul><li>Compare a mixture to a substance </li></ul><ul><li>Name common separation techniques for a mixture </li></ul><ul><li>Define mixture, homogeneous, heterogeneous, distillation, filtration, chromatography </li></ul>
    3. 3. Mixture <ul><li>Two or more kinds of elements or compounds combined without a chemical reaction. </li></ul><ul><li>Individual components maintain their individual properties. </li></ul>
    4. 4. <ul><li>Physical properties may change </li></ul><ul><li>Color </li></ul><ul><li>Melting point </li></ul><ul><li>Freezing point </li></ul><ul><li>Electron configuration of their atoms do not change. </li></ul>
    5. 5. <ul><li>Compounds combine in definite ratios – </li></ul><ul><li>H 2 0, C 6 H 12 O 6 , CO 2 , NaCl </li></ul><ul><li>Mixtures do not combine in definite amounts. They can be present in any ratio. </li></ul>
    6. 6. Matter Classification
    7. 7. Mixture Classification <ul><li>Mixtures are classified according to how well they are mixed. </li></ul><ul><li>Heterogeneous </li></ul><ul><li>Homogeneous </li></ul>
    8. 8. Separation techniques <ul><li>Manually . </li></ul>
    9. 9. Separation techniques <ul><li>Distillation </li></ul><ul><li>The solution is heated until it boils. The liquid with the lowest boiling point boils first and becomes a gas. </li></ul><ul><li>Evaporation </li></ul>
    10. 11. Separation techniques <ul><li>Decantation This separates a liquid from insoluble solid sediment by carefully pouring the liquid from the solid without disturbing the solid </li></ul>
    11. 12. Separation techniques <ul><li>Filtration . This separates a solid from a liquid through the use of a porous material as a filter. </li></ul><ul><li>Paper, charcoal, or sand can serve as a filter. </li></ul>
    12. 13. Separation techniques <ul><li>Settling . Centrifuge is a device in which solid or liquid particles of different densities are separated by rotating them in a tube in a horizontal circle. </li></ul>
    13. 14. Separation techniques <ul><li>Chromatography . a method for analyzing mixtures by separating them into the chemicals from which they are made. </li></ul>
    14. 15. Separation techniques <ul><li>Magnetism </li></ul>

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