Making salt from rock salt (H)
Method
1 Crush some rock salt using the mortar and pestle.
2 Put the crushed rock salt into a beaker and add some water. Stir the mixture.
3 Carefully filter the mixture. The liquid that comes through the filter paper should be clear.
4 Put a little liquid in an evaporating basin and heat it. WEAR EYE PROTECTION.
5 The powder that is left in the evaporating basin should be pure salt.
Conclusion:
Explain why you crush up the salt.
Explain why you place the rock salt in water.
Describe what is happening to the salt particles.
Explain why you filter the solution.
Describe how you get the salt back.
Explain why evaporation leaves the salt behind.
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