Hate to vacuum, but enjoy using a vacuum pump? Explore a lesson that starts with a demonstration of boiling water at various temperatures by using a vacuum pump. Then scholars design their own experiments to measure vapor pressure and evaporation rates. After completing a worksheet, pupils design two more experiments related to solutes and bond types. 

Concepts

vapor pressure, colligative properties, boiling points

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Additional Tags

science

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Instructional Ideas

• Bring in a pressure cooker and ask pupils to explain how it works

Classroom Considerations

• Requires prior knowledge of ionic versus covalent bonding, molarity, kinetics, and solubility
• Follow all safety recommendations to reduce fumes
• The first lesson in a series of eight

Pros

• Offers many strategies for differentiation
• Provides worksheets

Cons

• Resource does not include answer keys

Common Core

RST.9-10.3 RST.11-12.3