what do you observe when blue vitriol is heated?
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The formula of blue vitriol is CuSO₄.5H₂O .
The water molecules are in loose chemical combination with the substance.
Hence this is typically called water of crystallization.
What do we observe when this substance is heated ?
The substance was originally blue in colour.
If we heat it , it becomes white powder.
This is shown in the attachment.
As the substance loses its water of crystallisation , its colour changes from blue to white.
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