4.3.4

Required Practical: Separating Mixtures

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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.

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Preparation

  1. ­­Use a Bunsen burner to gently warm the acid.
  2. Add the insoluble solid (with stirring) until the reaction no longer happens.
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Filtration

  1. 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

  1. Heat the solution in an evaporating basin above a beaker of water.
    • The 'water bath' ensures gentle heating.
  2. 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.

Jump to other topics

1Atomic Structure

2Chemical Bonding

3Quantitative Chemistry

4Chemical Changes

5Energy Changes

6The Rate & Extent of Chemical Change

7Organic Chemistry

8Chemical Analysis

9Chemistry of the Atmosphere

10Using Resources

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