1. Unit 8: Solution Chemistry
Lesson 1: Solutions and Conductivity

2. Important Definitions
A solution is a homogeneous mixture made up of a solvent and a solute.
The solvent exists in the greater quantity, while the solute exists in the lesser quantity.
A solvent is saturated with a particular solute if the solvent has dissolved as much of the solute as possible.
The solubility of a solute is the maximum amount of it that can dissolve in a given amount of solvent at a given temperature.
10 min

4. Pick-a-Side: Solution or Not?
Oatmeal
Root beer
Copper
Brass
Water
5 min

5. Brain Break!

6. The Conductivity of Aqueous Solutions
Predict: What will happen when potassium permanganate (KMnO4) is added to the water?
Observe: Record your observations from the demonstration.
Explain: The greater the concentration of ions in a solution, the greater the electrical conductivity of a solution. As the potassium permanganate dissolves, it forms ions!
Demo 11.IX.5 – 15 min – test battery in advance!

7. General Rules of Conductivity*
Metals always conduct.
Solids other than metals don’t conduct.
Acids and bases in solution/liquid conduct.
Ionic solutions/liquids conduct.
All other substances don’t conduct.
*There are exceptions, but these provide useful guidelines.
5 min

8. Practice Time!
Pg. 198 #6-8
15 min