Filtration,evaporation and crystalisation

Cards (18)

  • What techniques can separate solids from liquids?
    Filtration, evaporation, and crystallization
  • What is a mixture of a liquid and an insoluble solid called?
    A mixture
  • What do we call a liquid with a soluble solid dissolved in it?
    A solution
  • In a solution, what is sodium chloride referred to as?
    Solute
  • What is the role of water in a solution of sodium chloride?
    Solvent
  • What is the purpose of filtration in separating solids from liquids?
    To separate insoluble solids from liquids
  • How does filter paper function in the filtration process?
    It allows liquids to pass but not solids
  • What is the first step in the evaporation process?
    Place the solution in an evaporating dish
  • What happens to the solvent during evaporation?
    It evaporates, leaving concentrated solution
  • What is a disadvantage of using evaporation for separating solids?
    Some solids may decompose when heated
  • What is thermal decomposition?
    Breaking down solids when heated
  • What is the first step in the crystallization process?
    Place the solution in an evaporation dish
  • How is crystallization different from evaporation?
    It uses gentler heating to avoid decomposition
  • What happens as the solution cools during crystallization?
    More crystals start to form
  • What is the final step after filtering crystals from the solution?
    Dry the crystals
  • How can you dry the crystals after crystallization?
    Leave them warm or use an oven
  • What are the steps involved in the evaporation process?
    1. Place solution in evaporating dish
    2. Heat gently with bunsen burner
    3. Solvent evaporates, solution concentrates
    4. Crystals form as solution becomes saturated
    5. Collect dry crystals
  • What are the steps involved in the crystallization process?
    1. Place solution in evaporation dish
    2. Heat gently, possibly using a water bath
    3. Stop heating when crystals start forming
    4. Allow solution to cool for more crystals
    5. Filter out crystals from solution
    6. Dry the crystals