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                      Chapter - Solution. 

1. *Colloidal Solution*

    - *Concept:* A mixture in which particles are dispersed in a medium but not dissolved.

    - *Activity:* Prepare a colloidal solution using milk and water.

    - *Picture:* A glass of milk showing particles dispersed in water.

2. *Concentration*

    - *Concept:* The amount of solute in a given amount of solution.

    - *Activity:* Compare different concentrations of sugar in water.

    - *Picture:* Three glasses of water with different amounts of sugar dissolved.

3. *Dissolution*

    - *Concept:* The process of a solute dissolving in a solvent.

    - *Activity:* Observe sugar dissolving in water.

    - *Picture:* Sugar crystals dissolving in a glass of water.

4. *Homogeneous Mixture*

    - *Concept:* A mixture that has the same composition throughout.

    - *Activity:* Prepare a homogeneous mixture of water and salt.

    - *Picture:* A glass of saltwater with uniform composition.

5. *Heterogeneous Mixture*

    - *Concept:* A mixture that does not have the same composition throughout.

    - *Activity:* Mix sand and water to demonstrate a heterogeneous mixture.

    - *Picture:* A mixture of sand and water with visible particles.

6. *Mixture*

    - *Concept:* A physical blend of two or more substances.

    - *Activity:* Create different mixtures using everyday materials.

    - *Picture:* A mixture of different colored sands.

7. *Particle Size*

    - *Concept:* The size of particles in a solution or mixture affects its properties.

    - *Activity:* Compare particle sizes in different solutions.

    - *Picture:* A diagram showing different particle sizes in solutions.

8. *Saturated Solution*

    - *Concept:* A solution that cannot dissolve any more solute at a given temperature.

    - *Activity:* Prepare a saturated solution of salt in water.

    - *Picture:* A glass of water with undissolved salt at the bottom.

9. *Solubility*

    - *Concept:* The ability of a substance to dissolve in a solvent.

    - *Activity:* Test the solubility of different substances in water.

    - *Picture:* A graph showing solubility curves for different substances.

10. *Solute*

    - *Concept:* The substance that is dissolved in a solvent.

    - *Activity:* Identify the solute in different solutions.

    - *Picture:* Sugar crystals as the solute in a sugar-water solution.

11. *Solution*

    - *Concept:* A homogeneous mixture of two or more substances.

    - *Activity:* Prepare different solutions and identify their components.

    - *Picture:* A glass of sugar water as a solution.

12. *Solvent*

    - *Concept:* The substance that dissolves the solute.

    - *Activity:* Identify the solvent in different solutions.

    - *Picture:* Water as the solvent in a saltwater solution.

13. *Supersaturated Solution*

    - *Concept:* A solution that contains more solute than it can normally hold at a given temperature.

    - *Activity:* Prepare a supersaturated solution and observe its properties.

    - *Picture:* A supersaturated solution with crystals forming.

14. *Suspension*

    - *Concept:* A mixture in which particles are dispersed in a medium but settle over time.

    - *Activity:* Prepare a suspension using mud and water.

    - *Picture:* A mixture of mud and water with particles settling.

15. *Unsaturated Solution*

    - *Concept:* A solution that can dissolve more solute at a given temperature.

    - *Activity:* Prepare an unsaturated solution and add more solute.

    - *Picture:* A glass of water with sugar that can still dissolve more sugar.