GCSE Chemistry worksheet focusing on Atomic Structure and separation techniques, featuring diagrams and questions on filtration, crystallisation, and related concepts.

- Pour the solution into an evaporating dish
- Heat the solution to evaporate some of the solvent
- When crystals begin to form remove from heat and leave to cool
- Filter the crystals out of the solution
- Warm the crystals to dry them

1) A solvent is a substance, usually a liquid, that dissolves another substance (the solute) to form a solution.
2) An insoluble solid is a solid that does not dissolve in a particular solvent.
3) The point at which crystals start to form is called the saturation point.
4) Crystals form because evaporating the solvent increases the concentration of the solute. When the concentration exceeds the solubility limit of the solute in the solvent at that temperature, the excess solute can no longer stay dissolved and precipitates out as crystals.