Science·Matter & Materials·procedural
Separating Mixtures
Select and carry out appropriate separation techniques for different types of mixtures: filtration (insoluble solids), distillation (liquids by boiling point), crystallisation (dissolved solids), and chromatography (coloured substances)
Suggested ages 11–13
Evidence of understanding
- Selects the correct separation technique for a given mixture with justification
- Describes the steps of simple distillation and explains why it works
- Interprets a chromatography result (Rf values, number of components)
- Explains why filtration removes sand from water but not salt
Assessment prompt
If Separating Mixtures needed to separate salt from sand mixed together in water, could they describe two stages of separation, the equipment needed, and explain why each step works?
Standards alignment
KS3.Sci.Chem.PIS.2GB · uk-nc-2013
Separating Mixtures
The national curriculum in England: Key stages 1 and 2 framework document · KS3