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3.3

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3.3

  1. 1. 3.3 Mixtures of Matter
  2. 2. Mixtures <ul><li>Combination of 2 or more substances </li></ul><ul><li>Mixed, not bonded together </li></ul><ul><li>Can be separated physically </li></ul>
  3. 3. Heterogeneous Mixture <ul><li>Not-even blending </li></ul><ul><li>Examples: </li></ul><ul><ul><li>OJ with pulp </li></ul></ul><ul><ul><li>Milk </li></ul></ul><ul><ul><li>Dirty water </li></ul></ul><ul><ul><li>Oil/vinegar salad dressing </li></ul></ul><ul><ul><li>fog </li></ul></ul>
  4. 4. Homogenous Mixture <ul><li>Even blending </li></ul><ul><li>a.k.a. “solution” </li></ul><ul><li>Examples </li></ul><ul><ul><li>Gas-gas </li></ul></ul><ul><ul><li>Gas-liquid </li></ul></ul><ul><ul><li>Liquid-gas </li></ul></ul><ul><ul><li>Solid-liquid </li></ul></ul><ul><ul><li>Solid-solid </li></ul></ul>
  5. 6. Separating Mixtures <ul><li>Each based on some physical property </li></ul><ul><ul><li>Size of particles </li></ul></ul><ul><ul><li>Solubility </li></ul></ul><ul><ul><li>Boiling point </li></ul></ul><ul><ul><li>Melting point </li></ul></ul><ul><ul><li>Conductivity </li></ul></ul><ul><ul><li>Magnetism </li></ul></ul><ul><ul><li>Etc. </li></ul></ul>
  6. 7. Filtration <ul><li>heterogeneous mixtures – sep. by size </li></ul><ul><li>Best for solid in a fluid (liquid or gas) </li></ul>
  7. 8. Distillation <ul><li>Good for homogeneous solutions (if components have different boiling points) </li></ul>
  8. 9. Crystallization <ul><li>Form solid particles from a supersaturated solution </li></ul><ul><li>Adding more substance to solution = crystals! </li></ul>
  9. 10. Sublimation <ul><li>Only works for substances that do this (at different temperatures) </li></ul>
  10. 11. Chromatography <ul><li>Size separation </li></ul><ul><li>Commonly used for pigments </li></ul>
  11. 12. 15. Classify the following as heterogeneous or homogeneous <ul><li>A. tap water </li></ul><ul><li>B. air </li></ul><ul><li>C. raisin muffin </li></ul>
  12. 13. 17. Describe the separation technique that could be used <ul><li>A. two colorless liquids </li></ul><ul><li>B. a nondissolving solid mixed with a liquid </li></ul><ul><li>C. red and blue marbles of same size and mass </li></ul>

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