1. 7.2 Concentration and Solubility
Monterey highlands elementary school
Physical scince
Mr. Sapalicio

2. Concentration
Concentration- The amount of a particular substance in a given amount of another substance, especially a solution or mixture.
How Concentrated is it?- The amount of solute in the solvent tells you how concentrated something is.
P. 262 – the process of making syrup.

3. Changing Concentration
Concentrated Solution- has a lot of solute dissolved in a certain amount of solvent.
How can you make a solution more concentrated?
By adding more solute
By taking out solvent
Dilute solution- has only a little solute dissolved in a certain amount of solvent.
How can you make a dilute solution?
Add more solvent
2. Take out some solute.

4. Solubility Can I make my drink full of a solute
No, at some point the solute will stop dissolving, and your drink will not become any sweeter/ salty/ sour, etc.
Solubility- (dissolvability)a measure of how much solute can dissolve in a solvent at a given temperature.
Unsaturated Solution- a solution in which more solute can be dissolved.
Saturated Solution- A solution in which the maximum amount of solute has been dissolved. Any more solute added will sit as crystals on the bottom of the container.

5. Working with solubility
Chart 7 on p.264- some substances solubility is more than others. Baking soda- 6.3g, table sugar 180g.
Which is more soluble?
You can identify a substance by its solubility because it is a characteristic property of matter.

6. Factors affecting solubility
Which dissolves more sugar iced tea or hot tea?
Factors that affect the solubility of a substance include pressure, the type of solvent, and temperature.

7. Pressure
Increasing the pressure increases the solubility of gases.

8. Solvents
Some solvents and solutes are not compatible
ex: Vinegar and Oil (for salad)
Oil and water do not mix as well.
Why?- water is a polar compound (-, +, ionized) and oil is a non polar compound (=, non-ionized)
soap molecules work as a bridge between polar water molecules and non-polar oil molecules.

9. Temperature
The solubility of table sugar in water at
0°C is 180g
25° C is 231g
100°C is 487g
When heated a solution can dissolve more solute than it can at cooler temperatures.

10. Supersaturated solution
 If you attempt to dissolve sugar in water, you reach a point where you cannot dissolve any more sugar. This is called a saturated solution.
However, if you heat this solution, more sugar will dissolve.
When the solution is cooled, the sugar will remain in solution. This is called a supersaturated solution, 

11. Work on page 266 Math Analyzing Data
Now do =)
Work on page 266 Math Analyzing Data