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Galvanic Cells and Orange Juice

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    Orange Juice is a common household item in the refrigerator. 

    Did you know it could also do this?
    Video from JCE Web Software, Chemistry Comes Alive!
    Copyright ACS Division of Chemical Education, Inc.
    Used with permission.

    A galvanic cell is made from a combination of a magnesium strip, a copper strip, and juice in a beaker. The current from this cell is used to drive a clock normally powered by a DC battery.

     

    Voltage versus Time

    Video from JCE Web Software, Chemistry Comes Alive!
    Copyright ACS Division of Chemical Education, Inc.
    Used with permission.
    There is no narration for this video.

    Here we see a chart recorder making a record of the voltage generated by the cell as a function of time. The voltage drops each time the clock ticks. Why do you think that is?

    From ChemPRIME: 17.12: Galvanic Cells and Free Energy

    Contributors and Attributions

    This page titled Galvanic Cells and Orange Juice was last modified on Sat, 11 Mar 2023 22:57:26 GMT and is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Ed Vitz, John W. Moore, Justin Shorb, Xavier Prat-Resina, Tim Wendorff, and Adam Hahn.

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