Question
How can you convert saturated solution into unsaturated or vice-versa?
Solution
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Saturated to Unsaturated Solution
- A saturated solution contains the maximum amount of solute that can be dissolved at a given temperature. To make it unsaturated, you can:
- Increase the temperature:
Most solids dissolve more at higher temperatures. Heating allows more solute to dissolve, turning the solution unsaturated. - Add more solvent:
Adding extra solvent (like water) decreases the concentration of the solute, making the solution unsaturated.
Unsaturated to Saturated Solution
- An unsaturated solution can dissolve more solute. To make it saturated, you can:
- Add more solute until no more dissolves:
Keep adding the solute while stirring. When it starts settling at the bottom, the solution has become saturated. - Lower the temperature (in some cases):
Cooling can reduce solubility of the solute, making a previously unsaturated solution become saturated.
Example:
- Add sugar to warm water: it dissolves easily (unsaturated).
- Keep adding sugar: eventually it stops dissolving (saturated).
- Add more water: the extra sugar dissolves again (back to unsaturated).
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