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It Needs a Battery - Chemistry Demonstration

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Uploaded on Jun 2, 2007

Watch as a colorless solution changes to blue when a 9V battery is dropped into the beaker. The blue color then fades when the battery is removed. A red cloth is dipped into the colorless solution and appears to absorb the elusive blue color. The blue cloth is dipped into another beaker where the blue color disappears until it is rung out of the cloth over the final beaker. This trick is a great example of electrochemistry, acids, bases and indicators.

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