1. Solubility
Grade 7 Science

2. Learning Goals
Describe the difference between saturated and unsaturated solutions.

3. Review: Solutions are formed by a solute dissolving in a solvent
Solute= small quantity
Solvent= large quantity
Soluble= able to dissolve in a specific solvent
Insoluble= unable to dissolve in specific solvent

4. Concentrated vs. Dilute Solutions
Concentrated Solution a solution with a large number of solute particles in a given volume of solution
Dilute Solution a solution with a small number of solute particles in a given volume of solution

5. Concentration The amount of solute in a solution.
The more solute dissolved, the greater the concentration.
Eg. Let’s look at food colouring water.

6. Food Colouring 1. Put 1 drop of food colouring in cup 1.
2. Put 5 drops of food colouring in cup 2.
3. Put 20 drops of food colouring in cup 3.
Describe how the concentration changes as you add more drops on your sheet, using scientific vocab.

7. Saturated vs. Unsaturated
There is a limit on how much solute can be dissolved in a solvent.
Saturated Solution a solution in which no more solute can dissolve
Unsaturated Solution a solution in which more solute can be dissolved

8. Saturated vs. Insoluble
Sometimes a solvent may seem insoluble, however, the solvent may just be saturated.
The amount of solute added to a solvent is important, and must always be considered when talking about dissolving.

9. Solubility
A measure of how much solute can dissolve in a certain solvent to form a saturated solution at a particular temperature.

10. Factors that affect Solubility
The nature of the solute and solvent
Temperature
Pressure (gases only)