Filtration, Evaporation and Crystallisation

Start with the separation methods

Begin with a mind map on filtration and crystallisation. It describes filtration as a way to separate an insoluble solid from a liquid and also outlines crystallisation. Another map considers how the choice of method depends on whether a solid can dissolve in the liquid. Together, they give you a starting point for comparing the methods on this page.

Next, use the flashcards on filtration and crystallisation to review mixtures that can be filtered, the methods involved and how crystals form. The deck also raises hazards associated with hot apparatus. The flashcards in “Filtration under reduced pressure” ask about the purpose of the method, its steps and a labelled diagram.

Follow the practical steps

The “Separating Rock Salt” flowchart lays out a sequence that includes grinding, dissolving, filtering and evaporation. Follow the sequence to see how the methods appear in a single separation process. A second flowchart on separating soluble solids sets out evaporation and crystallisation as ways to approach a solution.

For a closer look at evaporation, the “Measuring Mass using Evaporation” mind map describes measuring a container and its solution, then heating the solution to evaporate the solvent. Use the map to follow the measurements alongside the practical steps.

Use quizzes and maps together

After studying a map, try a quiz and return to the map for any steps you want to review. “Chemistry GCSE C2 Filtration” offers a filtration-focused quiz. Another Chemistry quiz asks about obtaining crystals from salt solutions. You can also use the flashcards to practice recalling a method before looking at the map again.

Place the topic in the unit

Filtration, Evaporation and Crystallisation is a section of the Separating Mixtures unit in Chemistry. The resources connect these methods through examples involving solids, liquids and solutions. Choose a flowchart or mind map and follow one process from its starting mixture.