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Is copper sulphate dissolves in water a physical or chemical change?
Wiki User
∙ 7y ago
A physical change is different from a chemical change in two ways:
1) In a physical change no new substances are made; in a chemical change new substances are made.
2) A physical change can be easily reversed; a chemical change cannot be easily reversed.
Dissolving copper sulphate in water does not produce a new substance. The copper sulphate solution is a mixture, not a pure substance.
Also, by evaporating the water you can easily get the copper sulphate back again.
So, dissolving copper sulphate is a physical change.
Sometimes, though, when water is added to copper sulphate, it reacts with the water to form copper sulphate pentahydrate, which is a new compound. This would be a chemical change, but actually dissolving it is indeed a physical change only.
See these sites for more information:
http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/chem_react_2.shtml
http://www.chem4kids.com/files/matter_chemphys.html
Geoffrey Huels
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