The Reaction:
CuSO₄·5H₂O (s) → CuSO₄ (s) + 5H₂O (g)
Explanation:
* Copper sulfate pentahydrate (CuSO₄·5H₂O) is a blue crystalline solid. It contains five water molecules associated with each copper sulfate molecule.
* Heating provides the energy to break the bonds between the water molecules and the copper sulfate.
* Water (H₂O) is released as a gas, leaving behind anhydrous copper sulfate.
* Anhydrous copper sulfate (CuSO₄) is a white powder.
Observations:
* You'll observe a change in color from blue to white.
* You'll see water vapor being released as the crystals heat up.
Uses:
This reaction is used to:
* Prepare anhydrous copper sulfate, which is used in various applications like drying agents, fungicides, and electroplating.
* Determine the water of crystallization in a hydrated salt.
Important Note: The dehydration reaction is reversible. If you add water to anhydrous copper sulfate, it will re-absorb the water and turn blue again.
