1. Y9 Chemistry unit lesson 9
Types of chemical reactions
Practical lab

2. Types of reactions Learning Objectives
List the main types of reactions
List examples of the main types of reactions
Write equations and identify the type of reaction
Define endothermic and exothermic reactions

3. Types of Chemical Reactions
Synthesis
Decomposition
Single replacement
Double replacement
Thermal Combustion

4. Synthesis
two or more simple substances combine to form a more complex substance.
reactant + reactant > product

5. Decomposition One reactant yields 2 or more products
reactant > product + product + product

6. Single Replacement
a single uncombined element replaces another in a compound.

7. Double Replacement
parts of two compounds switch places to form two new compounds.

8. Combustion (Burning)
when fuels (hydrocarbons) are combined with oxygen, they react and produce carbon dioxide and water as well as heat and light

9. ENERGY OF CHEMICAL REACTIONS
Endothermic
energy is absorbed and the products feel cold
Exothermic
energy is released and the products feel warm
combustion (burning) is an exothermic chemical reaction

10. TaskS Read page 22 in your booklet, then Read page 100-101
Complete the questions #1-6 in your notebook
Practical Lab- this lesson or next
Spot labs
With your partner/group go to each spot lab
Follow the instructions provided
Take notes and write a report of your findings in your notebook