Separation Techniques

Question 1

Simple Distillation

Answer 1

• Mixture of liquids or liquids and solids eg. ethanol and water
• Difference in boiling point
• produce pure drinking water from dirty water

Question 2

Sieving

Answer 2

• Mixture of 2 different sized particles to separate smaller and bigger one eg. flour and bran
• Different sized particles
• Separating bran from flour

Question 3

Magnetic Separation

Answer 3

• Mixture of magnetic substance mixed with non-magnetic material
  eg. iron filings from sulfur
• uses magnet to attract magnetic substance
• Mining, separating ores

Question 4

Filtration & Crystallisation

Answer 4

• Mixture of insoluble solid in liquid eg. sand & water
• Difference in solubility, boiling points
• Purifying drinking water

Question 5

Decantation

Answer 5

• mixture of solid and liquid eg. rock & water
• Difference in solubility
• Removing marbles from water

Question 6

Separating Funnel

Answer 6

• Mixture of liquid and immiscible liquids eg. water & oil
• Difference in density
• Oil and water separation