Question

Explain how crystals of copper sulphate dissolved in water is a physical change

Answer 1

Simply if there is a change in the chemical composition of the reactants after the reaction(or action) we can say it's a chemical change. Else if you see physical state of a reactant change from one state to other it's a physical change.

In this case copper sulphate disassociates into copper and sulphate ions, so from a crystal to dissolved state( a physical change).

Answer 2

Answer:

its is so because no new substances r formed as the product is hydrated copper sulphate and Because it can be reversed easily physically to their original states.