Young scientists know that water is H2O, but can they prove it? Through a simple electrolysis of water demonstration, scholars see the two gases produced as a result of a chemical reaction. Because this reaction doesn't happen spontaneously, you can initiate it by using a battery.

Concepts

electrolysis, energy, batteries, chemical reactions

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Additional Tags

science

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Instructional Ideas

• Instead of doing it as a demonstration, let students perform the experiment themselves
• Use small test tubes to collect the two gases and discuss the ratio difference

Classroom Considerations

• Relies on prior knowledge of chemical equations

Pros

• Requires common and economical materials
• Includes ideal answers to discussion questions
• Offers a few extension ideas for those who wish to learn more

Cons

• None

Common Core

RST.9-10.4 RST.11-12.4