3.9 Modern Purification Methods

5 Questions | Total Attempts: 99

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3.9 Modern Purification Methods

We discussed earlier some common methods of purification. In this screencast, we will discuss more methods of purification including the ones we will be using in school along with ones that are a little bit more high tech and more expensive. Earlier we discussed the process of filtration and of crystallization. We also talked about distillation for liquids with different boiling points. Now we are adding some more advanced forms of distillation including vacuum distillation (used for substances with high boiling points), and spinning ban distillation (for liquids with similar boiling points). There are also some more advanced types of chromatography. There is paper chromatography, used mostly in high schools, thin layer c


Questions and Answers
  • 1. 
    The boiling point of propyl alcohol is 97.5 degrees celcius while water's is 100 degrees celcius.  These two are relatively close, so to separate a mixture of them I will use
    • A. 

      Vacuum Distillation

    • B. 

      Layer separation

    • C. 

      Spinning band distillation

    • D. 

      Thin layer chromatography

  • 2. 
    What is the best method to separate sand from water?
    • A. 

      Filtration

    • B. 

      Gas chromatography

    • C. 

      Paper chromatography

    • D. 

      Layer separation

  • 3. 
    When you have a mixture of many different liquids and solids and you don't know what any of them are, it would be easiest to use thin layer chromatography to separate all of the parts.
    • A. 

      True

    • B. 

      False

  • 4. 
    Crystallization is best used for ___________ __________.
  • 5. 
    Check all that apply: High Performance Liquid Chromatography is used to separate
    • A. 

      Complex mixtures of solids

    • B. 

      Complex mixtures of liquids

    • C. 

      Complex mixtures of gases

    • D. 

      Complex mixtures of cheerios

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