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Vacuum Filtration - Buchner

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Practise setting up a vacuum filtration using a Buchner funnel, making decisions on the appropriate glassware and filter paper size, and ensuring correct wetting and rinsing steps are carried out.

Learning Outcomes

  • Understand the basic principles of vacuum filtration using a Buchner funnel
  • Learn how to make decisions on appropriate glassware and filter paper size
  • Understand the importance of a seal, correct wetting and rinsing steps
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Using Instruments and Equipment

  • What equipment is required to perform Buchner filtration
  • How to set up the Buchner filtration apparatus
  • Why it is important to consider the size of the flask and filter paper 
  • How pre-wetting the filter paper can help keep the paper in position

Obtaining and Recording Data

  • Why it is important to rinse the beaker to ensure all the sample is filtered

Working in a Safe Manner

  • Why the flask should be clamped prior to use

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University of the Western Cape

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