Page 272 - Science Course 3 (Book 1)

Chemical Reactions Mo7-L5a: What are the Types of Chemical
Lesson 5 Reactions?

Single Replacement
a type of chemical reaction in which one element
In this topic, you will learn the following replaces another element in a compound.
lessons:

Mo.7–L5a: What are the Types of Chemical
Reactions?

Mo7-L5a What are the Types of Chemical
Reactions?
KEY CONCEPTS:
1. How can you recognize the type of chemical
reaction by the number or type of reactants and
products? AB + C A + BC
2. What are the different types of chemical
reactions?
Double Replacement Reaction
a type of chemical reaction in which the negative
Vocabulary A-Z ions in two compounds switch places, forming two
new compounds.
Let us learn some vocabulary

Synthesis
a type of chemical reaction in which two or more
substances combine and form one compound.

W–Z + Y–Z --> W–Y + X–Z

Combustion
a chemical reaction in which a substance combines
with oxygen and releases energy.

Synthesis
A B Reaction AB

Decomposition
a type of chemical reaction in which one compound
breaks down and forms two or more substances.

Water hydrogen + oxygen

2H 0 2H 2 + 0 2
2
CH 4 2O 2 CO 2 2H O
2
Carbon
O O Methane Oxygen Dioxide Water

O
O
H
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