chapter 9.2: types of chemical reactions
DESCRIPTION
8th Grade Integrated Science Chapter 9 Lesson 2 on Types of Chemical Reactions. This chapter explains five different types of reactions: synthesis, decomposition, single replacement, double replacement, and combustion.TRANSCRIPT
Chapter 9.2: Types of Chemical Reactions – p311-315 – page 1
Vocabulary
Synthesis (313) - A synthesis is a type of chemical reaction in which two or more substances combine and form one compound.
Decomposition (313) - In a decomposition reaction, one compound breaks down and forms two or more substances.
Single Replacement (314) - In a single-replacement reaction, one element replaces another element in a compound.
Double Replacement (314) - In a double-replacement reaction, the negative ions in two compounds switch places, forming two new compounds.
Combustion (314) - Combustion is a chemical reaction in which a substance combines with oxygen and releases energy.
Types of Chemical Reactions
There are many different types of reactions. Most fit into 4 major categories. o _____________________ o _____________________ o _____________________ o _____________________
Synthesis
A synthesis is a type of chemical reaction in which two or more substances combine and form one_______________________.
Example:
Decomposition Reactions
In a decomposition reaction, one compound breaks down and forms two or more________________________.
So one reactant will form two or more______________________.
The ___________________of synthesis. o Example:
Chapter 9.2: Types of Chemical Reactions – p311-315 – page 2
Replacement Reactions
Single-replacement o In a single-replacement reaction, one element replaces another element in
a_____________________. o In this reaction one element and a compound react and form a different element
and a different_______________. o Example:
Double-Replacement o In a double-replacement reaction, the negative ____________ in two compounds
switch places, forming two new compounds. o In this reaction you start with 2 compounds and end with two
_______________compounds. o Example:
Combustion Reactions
Combustion is a chemical reaction in which a substance combines with ______________and releases energy.
This energy usually is released as thermal energy and _______________energy.
__________________is a common combustion reaction.