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Geometric Equations Challenge (9 Favorites)

LESSON PLAN in Balancing Equations, Classification of Reactions. Last updated November 14, 2018.


Summary

In this lesson plan, students find patterns in the reactions between several geometric shapes and give names to different types of equations. They then look at chemical reactions and learn about the five main types of reactions.

Grade Level

High school

Objectives

By the end of this lesson, students should be able to

  • identify types of reactions.
  • describe how elements are rearranged during each type of reaction.

Chemistry Topics

This lesson supports students’ understanding of

  • Types of reactions

Time

Teacher Preparation: 5 minutes
Lesson
: 60 minutes

Materials

  • Student handouts

Safety

  • There are no special safety considerations for this activity.

Teacher Notes

  • This activity is used as an introduction to types of reactions.
  • Students do not need background knowledge of types of reactions, but should be familiar with how reactions are written.

For the Student

Lesson

Engage

Have students complete the first part of the activity. They may work either in groups of alone.

Using the following shape equations, give each set:

  1. a unique descriptive name (that reflects how the shapes rearrange themselves)
  2. a written description of what is happening and
  3. create your own example that follows the pattern for the group.

Compare the differences between the types of equations in all 5 groups.

Group 1

Name ________________________________________________

Description of Equation Type 1 ________________________________________________

Your New Example: __________________________________________________________

Group 2

Name ________________________________________________

Description of Equation Type 1 ________________________________________________

Your New Example: __________________________________________________________

Group 3

Name ________________________________________________

Description of Equation Type 1 ________________________________________________

Your New Example: __________________________________________________________

Group 4

Name ________________________________________________

Description of Equation Type 1 ________________________________________________

Your New Example: __________________________________________________________

Group 5

Name ________________________________________________

Description of Equation Type 1 ________________________________________________

Your New Example: __________________________________________________________

Before students begin the second portion of the activity, initiate discussion about what names they came up with for each type of reaction. For each group of reaction, ask questions such as:

What patterns did you notice?

How did the shapes rearrange themselves?

Did the number of shapes change during the reaction? Do the shapes themselves look different? If not, what changed about them?

After discussing the initial activity, begin to transition into actual chemical equations.

Chemical elements also rearrange themselves, much like the shapes in the previous activity.

Point out the patterns found in each type of reaction and how they relate to the patterns found above.

With the students, work through each type of reaction, noting the patterns found, and name the reaction type.

To lead the students into the concept of balancing equations, you may want to point out that the number of elements changed when they react. Ask the students;

Should this happen? Why or why not? What can be done to make sure the number of atoms of reactants equals the number of atoms of products?

GROUP A TYPE OF REACTION
Al+S Al2S3 Type of Reaction Name:
H2 +O2 H2O
N2+Mg Mg3N2
GROUP B
NaCl Na+Cl2 Type of Reaction Name:
Rb3P Rb+P
MgO Mg+O2
GROUP C
Sr+CO2 SrO+C Type of Reaction Name:
Al+CuCl2 AlCl3+Cu
Li+Mg(OH)2 LiOH+Mg
GROUP D
Na3PO4 +KI K3PO4 +NaI Type of Reaction Name:
Al(OH)3+KBr

AlBr3+KOH
HCl+NaOH NaCl +H2O
GROUP E
C2H6+O2 CO2 +H2O Type of Reaction Name:
C6H6+O2 CO2 +H2O
C3H8+O2 CO2 +H2O