Required Practical: Separating Mixtures
Chemistry: Edexcel IGCSE, topic 12.1.10
Required Practical - Separating Mixtures
The aim of this practical is to produce a pure, dry sample of a soluble salt from an insoluble oxide or carbonate.
Preparation
- Use a Bunsen burner to gently warm the acid.
- Add the insoluble solid (with stirring) until the reaction no longer happens.
Filtration
- Filter the solution to remove the excess insoluble solid.
- This will leave a solution of the salt dissolved in water.
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Crystallisation
- Heat the solution in an evaporating basin above a beaker of water.
- The 'water bath' ensures gentle heating.
- Let the solution cool and allow more water to evaporate.
- As water evaporates, the solution will become more concentrated and the salt will begin to crystallise.