Separation and Purification Interactive Lesson
Explore filtration, crystallisation, distillation, chromatography, locating agents, purity and Rf values through simulations and a 40-question assessment.
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Learning Objectives
Choose suitable methods for separating mixtures.
Describe filtration, evaporation, crystallisation and distillation.
Explain paper chromatography, locating agents and solvent fronts.
Calculate and interpret Rf values.
Identify residue, filtrate and distillate.
Use purity tests such as melting point and chromatography.
Separation Technique Guide
Select a mixture type to choose the most suitable method.
Choose a mixture type.
Filtration: Residue and Filtrate
Drag the terms into the correct box.
Residue Filtrate Filter paperSolid left behind
Liquid collected
Porous barrier
Simple Distillation Simulator
Press play to show evaporation, condensation and collection of distillate.
EvaporateCondenseCollect distillate
Chromatography Simulator
Move the solvent front. Spots move different distances depending on their attraction to the paper and solubility in the solvent.
Rf Value Calculator
Rf = distance moved by spot ÷ distance moved by solvent front.
Purity Check
| Evidence | Pure Substance | Impure Substance / Mixture |
|---|---|---|
| Melting point | Sharp fixed point | Lower and broader range |
| Boiling point | Sharp fixed point | May change over a range |
| Chromatography | Usually one spot | More than one spot |
Video Lesson
40-Question Assessment
Each question is worth 1 mark. Submit to see your score, correct answers and explanations.
0 of 40 answered
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