Filtration and Crystalisation

• Filtration is used to separate an insoluble solid from a liquid.
• Filtration:

  • Put filter paper into a funnel leading to a conical flask
  • Add the mixture to the funnel
  • The liquid runs through the filter paper leaving behind the solid residue
• Crystallisation is used to separate a soluble solid from a solution.
• Crystallisation:

  • Pour the solution into an evaporating basin and heat to until most of the liquid has evaporated
  • Stop heating it and leave it to cool
  • Salt crystals form