1. Chemical Interactions
Unit 1
Chemical Interactions

2. Mixtures
When two or more materials are put together it is called a mixture.
Example:
Pasta + Sauce = Pasta and sauce mixture

3. Types of Mixtures Not all mixtures are solid + solid. Examples:
Air is a mixture of many gases
Salad dressing can be a mixture of liquids
Solutions are a special mixture between a solvent and a solute.

4. Solutions
When two substances (a solute and a solvent) are mixed, but the solute dissolves in the solvent, the mixture is a solution.
Example:
Salt + Water = Saltwater Solution

5. Parts of a Solution
The solute is the substance that dissolves. It is soluble. That means it can dissolve.
The solvent is the substance that does the dissolving.

6. Dissolving: The Particle Level
In a solution, the solvent particles hit the particles of the solute and break the bonds that hold the particles together. This is called dissolving.
When the solute is completely dissolved the broken off particles are spread evenly in the solution.

7. Particle Model
Step 1:
Step 2:
Solvent
Solute
Step 3:
Step 4: