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    Oregon Museum of Science and Industry
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    In this activity, learners explore acids and bases by preparing six solutions that combine vinegar and ammonia, ranging from acid (all vinegar) to base (all ammonia). They add an indicator to each...

    $5 - $10 per group Ages 8 - adult Under 5 minutes
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    The Science House
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    In this chemistry demonstration, learners observe a chemical reaction that produces a colorful effect. Learners will be surprised to see the colors change to red, white, and blue when ammonia is...

    $1 - $5 per group Ages 11 - 18 Under 5 minutes
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    The Science House
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    In this chemistry demonstration, learners will discover that phenolphthalein is a chemical that displays different colors depending on the acidity or basicity of the environment. Learners will be...

    $5 - $10 per group Ages 6 - 18 Under 5 minutes
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    Oregon Museum of Science and Industry
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    Learners combine different plant solutions -- made from fruits, vegetables, and flowers -- with equal amounts of vinegar (acid), water (neutral), and ammonia (base). They compare the color changes...

    1 cent - $1 per group Ages 11 - adult Under 5 minutes