Seperation Techniques

Question 1

Use of filtration

Answer 1

Separate an insoluble solid from a liquid

Question 2

Describe process of filtration

Answer 2

• pour liquid into filter paper
  = solid stays in filet funnel

Question 3

Use of crystallisation

Answer 3

Separate a soluble solid from a liquid

Question 4

Describe process of crystallisation

Answer 4

• leave liquid in container for a few days
  = water will evaporate and form crystals
• to speed up we can heat the liquid

Question 5

How to make copper chloride crystals

Answer 5

• add excess copper carbonate to dilute hcl
• remove excess carbonate by filtering solution
• heat filtrate to evaporate some water
• leave to cool to form crystals