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Filtration and Evaporation quiz

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Terms in this set (10)

  • Which substance is not normally found in filtrate during filtration?
    Insoluble solid is not normally found in filtrate; it remains as residue on the filter paper.
  • What forces drive filtration?
    Gravity and vacuum pressure are forces that drive filtration, depending on the method used.
  • What is required for filtration to occur?
    Filter paper is required for filtration as it acts as a semi-permeable membrane.
  • What is the force behind filtration: gravitational force, vacuum pressure, or both?
    Both gravitational force and vacuum pressure can be forces behind filtration, depending on the method used.
  • What does filtration use to separate insoluble solids from liquids?
    Filtration uses filter paper to separate insoluble solids from liquids.
  • How do substances move across a filtration membrane: by diffusion, by vacuum pressure, by gravitational force, or by magnetic attraction?
    Substances move across a filtration membrane by gravitational force or vacuum pressure.
  • What should not be found in filtrate: insoluble solid, soluble solid, liquid solvent, or dissolved gases?
    Insoluble solid should not be found in filtrate; it remains as residue on the filter paper.
  • What is the role of a vacuum pump in filtration?
    A vacuum pump speeds up filtration by creating a vacuum that draws the filtrate through the filter paper faster.
  • What is the difference between filtration and evaporation?
    Filtration separates insoluble solids from liquids, while evaporation isolates soluble solids by vaporizing the solvent.
  • How does a coffee filter demonstrate filtration?
    A coffee filter retains coffee grounds as residue while allowing liquid coffee to pass through as filtrate.