Topic 3: Chemical Reactions Study Guide 23-24 KEY

1. Heterogeneous mixture: A mixture where you can still see the different parts after it is combined

2. Homogeneous mixture: A mixture where you cannot see the individual parts after it is combined.

4. Solvent: The substance, usually a liquid, in which solutes dissolve to form a solution

5. Solution: a homogenous mixture of two or more substances where solutes dissolve in a solvent

6. Solubility: The ability and amount of solute that can dissolve into a solvent. Affected by temperature and other factors. Short Answer:

7. What are three main tools you could use to separate a mixture? Which would be the best way to separate a suspension like muddy river water? ● Magnet ● Hot plate ● Filter

8. If you add more solute to a mixture, what happens to the concentration of the solution? (Ex: You add a large amount of Kool-Aid mix to water.) The concentration of the solution increases .

9. Sweet tea is a mixture of water, tea leaves, and sugar.

• a. In this mixture, the SOLVENT is water .
• b. The SOLUTES are tea leaves and sugar .
• c. The SOLUTION IS sweet tea .

10. How does temperature affect solubility? As temperature increases, solids become more soluble, but gasses become less soluble. Part II. Chemical Change

11. A physical change is a change that alters the form or appearance of a material but does not make the material into another substance. (ex: water becoming ice or steam).