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Indicating Electrolysis
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In this activity, learners build a simple electrolysis device. Then learners use an indicating solution to visualize hydrogen and oxygen molecules in water.

Indicating Electrolysis
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Electrolysis is the breakdown of water into hydrogen and oxygen. This Exploratorium activity allows learners to visualize the process with an acid-based indicator.

Electrolysis
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Using electrolysis, learners produce hydrogen gas and oxygen gas from water molecules in a solution.

Having a Gas with Water
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In this activity, learners construct a simple electrolysis device. With this device, learners can decompose water into its elemental components: hydrogen and oxygen gas.

Electrolysis
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Learners observe two joined glass tubes containing a conductive salt solution. Electrodes are passing an electric current through the water.