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How do people determine if something is acidic or basic? Learners make their own acid-base indicators using red cabbage and then determine the acidity and alkalinity of different substances. First, they test substances of known pH and then compare other substances to determine their acidity or alkalinity. Finally, a class demonstration shows how mixing acids and bases causes neutralization.
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CCSS:
Adaptable
Concepts
Additional Tags
Instructional Ideas
- Allow pupils to bring in a substance from home to test in an extension activity
- Set up stations around the room to test different substances and have learners rotate on their own
Classroom Considerations
- Requires materials many classrooms do not have
Pros
- Provides extension activity for testing other acid-base indicators
- Includes a warm-up activity for making predictions
Cons
- None