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Collect Oxygen Over Water
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In this activity, learners use a pneumatic trough (see related activity) to generate and collect pure oxygen.

Surface Area and Soda Geysers
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This is an activity (located on page 4 of the PDF under Surface Area Activity) about surface area and reactivity.

Production of Oxygen
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In this chemistry activity, learners use yeast and hydrogen peroxide to generate a gas (oxygen) and test some of its properties.