1. Chapter 6 Chemical Reactions
Section 3
Balancing Equations
p. 198

2. Understand how to balance a chemical equation
Objectives
Understand how to balance a chemical equation

3. 2 H2 O2 2 H O 2 I. Describing A. Chemical Equations describe reactions
B. Balancing accounts for the law of
conservation of mass 2 H2 O2 2 +
H O  2

4. II. Determining mole ratios
A. Law of Definite Proportions
A compound always contains the
same elements in the same
proportions, regardless of how it is
made or how much is formed
B. Mole ratios come from balanced
equations

5. Homework…..