copper sulphate is white in color when it is in the powdered form. when water is added to it, its color changes to blue. is this a chemical change? why or why not?
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When water is added to white coloured anhydrous copper sulphate, its colour changes to blue, indicating that the blue coloured copper sulphate pentahydrate is regenerated. So, it is a reversible chemical change.
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It is a physical change because when the water evaporates we can get the copper sulphate back to the powdered form.
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