1. Concentration and Solubility
Yuck but yum!
Chapter 7 Section 2

2. Fruit begins as sugar and water
Concentration
Concentrated Solution A lot of solute in a certain amount of solvent. Dilute Solution A little bit of solute in a certain amount of solvent.
Fruit begins as sugar and water
Water is removed from the fruit to make a more concentrated solution (named “concentrate”)
Water is then added to the “concentrate” to make a less concentrated fruit juice

3. Measuring Concentration
To measure concentration you need to know:
Amount of Solute
Amount of Solvent
We talk about concentration as a percentage.

4. How to Make Maple Syrup http://www.howtomakemaplesyrup.com/
“What You Need to Make. . .”
Where does maple syrup come from?
Do trees produce a lot of this solution?
How much of this solution do you need?
Can we solve for the concentration of maple syrup?
“Turning Sap into Syrup”
What do you have to do to the solution?
What chemically is happening?
What physically is happening?
Are you making the solution more concentrated or more dilute?
How?

5. Solubility
Solubility is the measure of how much solute can dissolve in a solvent at a given temperature.
Unsaturated Solution:
You can continue to dissolve
solute into the solvent.
Saturated Solution:
You’ve added too much!
No more solute will dissolve.

6. Chocolate Milk!
What is the best way to make chocolate milk with powdered cocoa?

7. Factors Affecting Solubility
Pressure
Type of Solvent
Temperature
Increasing pressure
Increases solubility of gases
Examples:
Carbonated Drinks
Why do soda bottles sometimes explode?
Why does soda fizz?
Scuba Diving
Why do divers breathe in “compressed air”?

8. Factors Affecting Solubility
Pressure
Type of Solvent
Temperature
Some solutes and solvents just don’t mix!
Examples: Oil and Water
How do you get olive oil to mix with water when cooking?
What does oil-based salad dressing look like?
Why are oil-based paints hard to clean?

9. Factors Affecting Solubility
Pressure
Type of Solvent
Temperature
Increase temperature
Increase solubility of solids

10. Concentration and Solubility
Complete these questions with your group. Feel free to include pictures or whatever helps you understand them better.

11. Concentration and Solubility
Complete these questions with your group. Feel free to include pictures or whatever helps you understand them better.

12. What is Rock Candy? What is rock candy? A super saturated solution!
A super saturated solution!
Extra Credit:
Make you own rock candy at home!
Use Science Bob’s recipe and instructions.
Take a picture of your rock candy each day.
In less than a week, you should see rock crystals.
What is happening?