Here's why:
* Saturated Solution: A saturated solution holds the maximum amount of solute (copper sulfate) that can dissolve at a given temperature.
* Cooling: As the solution cools, the solubility of copper sulfate decreases. This means that the solution can no longer hold as much dissolved copper sulfate.
* Crystallization: The excess copper sulfate, unable to stay dissolved, comes out of the solution and forms crystals.
* Pentahydrate: Copper sulfate crystals typically form as pentahydrate, which means each copper sulfate molecule is associated with five water molecules (CuSO₄·5H₂O).
The resulting crystals are typically beautiful blue crystals, known for their distinct shape and color.
