Definition of mixture: A mixture consist of two or more substances which are physically combined together and no chemical reaction are involved.
Properties of a mixture:
1. A mixture can be separated by simple physical means.
2. The proportion of each substance in the mixture can vary.
3. The substances retain their chemical identity.
For the reaction of Copper (ii) Sulfate:
CuSO4(s) + H2O (l) --> Cu2+ (aq) + SO4 2- (aq)
This involve enthalpy change of hydration(Cu2+), enthalpy change of hydration of (SO4 2-), enthalpy change of solution and lattice energy.
All these consist of heat change and any reaction that has heat change is a chemical reaction.
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Is copper(ii) Sulfate a mixture??
Dear Valaydon Nallarasi,
The solution of copper sulfate is a mixture which consists of Cu, SO4 and water, and the solution can be separated by distillation method. However, pure copper sulfate can not be separate to the other substance, so it is pure substance. And the dissolution process of copper sulfate is a physical process, because there is no new substance generated in this process.
I will the above will help you.
It would be a nightmare if everyone gives his own definition of a commonly used term. IUPAC gold book clearly defines a mixture as
"mixture: Portion of matter consisting of two or more chemical substances called constituents." You must follow this definition. If you somehow combine two pure materials (constituents) such as Cu(II)SO4 and water, you will always have a mixture. It does not make any sense to discuss you definition of "mixture."
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