Explain why hot saturated solution of potassium nitrate forms crystals as it cools.

Explanation

To explain why a hot saturated solution of potassium nitrate forms crystals as it cools, we can break down the process into clear steps:

### Step-by-Step Solution:

1. **Understanding Saturation**:
- A saturated solution is one where the maximum amount of solute (in this case, potassium nitrate, KNO3) has been dissolved in a solvent (usually water) at a given temperature.

**Hint**: Recall that saturation means no more solute can dissolve in the solvent at that temperature.
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