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    COSI
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    This is a chemistry lab activity about solutions (page 6 of the PDF). Students make a limewater testing solution for carbon dioxide and explore the concepts of solubility and precipitates. The...

    $10 - $20 per group Ages 6 - 14 4 to 24 hours
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    COSI
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    This is a chemistry lab activity about solutions (page 7 of the PDF). Learners see firsthand how chemicals in a solution can combine to form an entirely different substance. They also see physical...

    $1 - $5 per student Ages 8 - 18 10 to 30 minutes