## Lesson 4

**Chemical Equations**

### Purpose

The purpose of this lesson on chemical equations is to show you how to use chemical
equations to represent chemical reactions. This includes learning how to **balance
chemical equations**, and how to **use balanced equations** to come up
with the weight relationships that you need to solve various kinds of chemical problems.

You have already dealt with many chemical reactions, such the electrolysis of water and
burning magnesium. You have solved problems involving how much of one chemical will react
with another, or how much of this can you get from that, and those kinds of things. You
will be doing more of that in this lesson, including more work with **limiting
reagent problems**. In addition, you will learn how to **categorize chemical
reactions** by looking at the equations that are used to represent them.

The general strategy used in this lesson is to provide you with a brief discussion of a
particular concept followed by worked-out examples from the workbook, followed by practice
problems (again from the workbook) and answers to those problems. You may wish to follow
through each page from beginning to end or you may choose to move directly to the practice
problems in the workbook after reading about the concept and look at the worked out
examples only if you run into problems. Whichever approach you use, be sure to get enough
practice that these tasks become routine for you.

Top of Page

Back to Course Homepage