Khan Academy Static

Without much more than a 9-volt battery, you can break water into its two molecular ingredients, hydrogen and oxygen. The four video modules of this hands-on science snack show you how to build a simple electrolysis device and break up water. Using an acid-base indicator, you'll also observe groovy swirls of color in the water as it changes.

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17275_Introduction_Breaking_up_water_isn_t_hard_to_do.html

17276_Do_the_experiment_Tools_materials_and_assembly.html

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