Individuals explore solubility by modeling how water dissolves salts. They then view a video and compare how well water and alcohol dissolve salts, relating their comparisons to the structure of each molecule. 

Concepts

water molecules, salt, dissolving, alcohols

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Additional Tags

science

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Instructional Ideas

• Relate the concept and make it relevant to learner's lives through discussions of ocean water, lemonade, liquid soaps, or any ionically bonded substance that water can dissolve; have them imagine how things would be different if water acted more like alcohol or couldn't dissolve these substances

Classroom Considerations

• Follow safety guidelines in lab and for your classroom/school when handling isopropyl alcohol in the lab
• Pupils may need more time to answer questions in the lab
• Part three in a series of nine

Pros

• Includes activity sheet, answer keys, video links, and teacher references
• Provides pre-scripted questions for teachers to ask throughout the lesson
• Requires simple materials found in most science classrooms

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