Classroom Chemistry | Lesson 4&5 - Chemical Reactions

Downloadable (1 PDF - 23 pages)

The activities Evidence of Chemical Reactions and Reversible or Not can also be found within the Classroom Chemistry - Let's Do Science Bundle. If you are interested in purchasing this activity and more, you can check out the Classroom Chemistry bundle here.

The following lessons, which are ideal for grade 5, have been taken from the Classroom Chemistry lesson bundle where students learn about the properties and interactions of some safe to handle household liquids and solids. They test a variety of materials to see what happens when things are mixed together: what dissolves, what reacts and what remains unaffected. They discover that when a solid material dissolves, it can be recovered as a crystal by evaporating the liquid. They also learn that when two materials react to form a new material, the original materials cannot be recovered. As an example of a chemical reaction, students learn to produce carbon dioxide gas and show that this gas differs from ordinary air.

After completing this lesson bundle, students will be able to:

• Follow proper safety precautions while carrying out an experiment
• Recognize and provide examples of mixtures which involve 2 or more liquids
• Recognize and describe evidence of a chemical reaction and a physical change
• Provide examples of chemical reactions and physical changes
• Know the difference between reversible and irreversible changes
• Provide examples of reversible and irreversible changes

Additional resources included with the activity plan:

• Student worksheet
• Lab sheet handout
• Class exercise
• Lab instructions
• Optional challenge activity

Additional resources required:

• Thermometer
• Plastic pipettes (optional)
• Small clear plastic cups
• Large clear plastic cups
• Baking soda
• Calcium carbonate
• Washing soda (Sodium carbonate)
• Epsom Salts
• Citric acid
• Calcium chloride
• Ice cubes
• Containers
• Vinegar
• White board or chart paper with an appropriate marker
• Access to a freezer