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Indicator Sponge A Discrepant Event Demonstration

Students explore the use of acid and base pH indicators. The teacher saturates an indicator sponge with congo red solution. Afterwards, the sponge is placed in a blue base solution. Students observe that the blue sponge actually turns red. They discuss the explanations for the color change.

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Concepts

Resource Details

Grade
5th - 8th
Subjects
Science
1 more...
Resource Type
Lesson Plans
Instructional Strategy
Inquiry-Based Learning