Describe two chemical tests for water
Answers
Answer:
Pure copper(II) sulfate is white. It is also known as anhydrous copper(II) sulfate because it has no water in it.
When water is present in a sample of copper(II) sulfate it turns blue.
Explanation:
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Answer:
Copper(II) sulfate test for water
Copper(II) sulfate test for waterCopper sulfate experiment
Pure copper(II) sulfate is white. It is also known as anhydrous copper(II) sulfate because it has no water in it.
When water is present in a sample of copper(II) sulfate it turns blue. It is still a dry solid, because the individual water molecules are trapped within the ionic lattice surrounding the copper(II) ions. Solutions of copper(II) sulfate are also blue.
This colour change can be used to detect the presence of water (or water vapour).
Cobalt(II) chloride test for water
Water can also be detected using blue anhydrous cobalt(II) chloride. This turns pink in the presence of water.
The picture is for first experiment.
