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Forwards and Backwards: pH and Indicators
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Visitors prepare six solutions combining vinegar and ammonia that range incrementally from acid (all vinegar) to base (all ammonia).

Chemical Identification
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In this activity, learners discover how a cabbage juice indicator helps identify acids and bases, and how iodine indicates the presence of starch.

Off Base
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In this activity, learners explore the factors that tend to resist changes in pH of the ocean and why the ocean is becoming more acidic.