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Vacuum filtration is the major technique used in this experiment. The following step sequences are recommended:...

Vacuum filtration is the major technique used in this experiment. The following step sequences are recommended: (1) turn on vacuum, (2) wet the filter paper, and (3) pour the product solution into the Buchner funnel.

Can the vacuum be turned on in the last step instead? Explain.

Engineering   Chemical-Engineering   
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Answer #1

Answer:

vacuum filtration is a filtration technique used to separate the solid particles from the liquid.

It is faster than gravity filtration.

Following steps involved in Vacuum filtration.

  • Clamping of a flask with a Ring stand.
  • Put Buchner funnel with rubber adaptor.
  • Put a filter paper on the funnel.
  • Connect the flask with the vacuum source.
  • Wet the paper with a solvent.
  • Pour the mixture to be filtered on filter paper placed on the funnel.
  • Wash the cake on filter paper with a small amount of solvent.
  • Then Remove the vacuum source.
  • After removing Vacuum sources, Remove the filter paper and collect the solid.

In last step, vacuum must be turned off for removing of solid easily from filter paper.

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