Can your breath change the acidity in a liquid? A instructional activity begins with a demonstration that proves it can. Then scholars perform an experiment to determine if other gases can change the pH of liquids. Finally, they research how this concept is changing our oceans and our planet. 

Concepts

carbon dioxide, acidity, solutions, climate change

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Additional Tags

science

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Instructional Ideas

• Test school water before demonstration; if it is not neutral, you will need to buy distilled water to use

Classroom Considerations

• Follow all safety regulations including using a well-ventilated room, handling flammable chemicals, and verifying with school administrators that the medication used in the extension is allowed in those quantities
• Requires either printing in color or purchasing color pH indicator charts
• Lesson is the 10th in a 12-part series

Pros

• Includes information on where to buy supplies and materials
• Lesson follows a 5E format
• Provides answer keys to all student work, expected lab results, and discussion questions

Cons

• None

Common Core

RST.6-8.3 RST.6-8.4 RST.6-8.7 WHST.6-8.1.a WHST.6-8.1.b WHST.6-8.1.c WHST.6-8.1.d WHST.6-8.1.e