C2.1.4 - Filtration/Crystallisation

Question 1

Solute

Answer 1

The substances that dissolves (salt, sugar, sand etc.)

Question 2

Solvent

Answer 2

The substance it dissolves in (water)

Question 3

What does filtration do?

Answer 3

Separates an insoluble (solid) from a (liquid) substance

Question 4

What does crystallisation do?

Answer 4

Separates two soluble substances

Question 5

Describe what happens in filtration

Answer 5

• Mixture put through filter paper (has tiny microscopic holes)
• Filtrate (i.e. water) passes through
• Residue (i.e. sand) is left on the paper

Question 6

Describe what happens in crystallisation

Answer 6

• Slowly heat, allow evaporation
  > (leaves saturated solution)
• Let it cool down
• Crystals will form