Chemistry in Action - The Fruit-Powered Clock

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You may have heard of a potato clock, where a clock is powered by placing metal electrodes into two potatoes. However, did you know that you can make a similar clock powered by fruit that actually works better than potatoes!? They both rely on the same concept of putting a zinc electrode and a copper electrode into something that serves as an electrolyte. The zinc and copper electrodes are the two galvanic cells for the clock while the fruit is the electrolyte. A galvanic cell is an electrochemical cell in which half-reactions of a spontaneously occurring oxidation-reduction reaction are physically separated, generating an electric current.  Learn exactly how all these components work to power a clock in today's free Chemistry video with Professor Gordon Yee. As a bonus, Professor Yee discusses Gilligan's Island and the reality of being able to recharge batteries while stranded on a desert island.


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This page contains a single entry by April Stockwell published on November 10, 2010 11:04 AM.

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