Filtration & Crystallisation

• A small amount of sodium chloride is dissolved into a beaker of water. Which of the following is the solvent:

  •  Water
• A solvent is a liquid in which substances can dissolve.
• Solid substances that can dissolve in liquids are described as soluble
• Solids that cannot dissolve are described as insoluble
• best method to remove salt from salt solution:

  • evaporation
• process of crystallisation:

  • Heat the solution until you start to see crystals forming
  • Allow it to cool so that more crystals form
  • Allow the rest of the water to evaporate // Filter out the crystals using filter paper and a funnel
  • Dry the crystals e.g. by using a drying oven