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
Ed Vitz (Kutztown University), John W. Moore (UW-Madison), Justin Shorb (Hope College), Xavier Prat-Resina (University of Minnesota Rochester), Tim Wendorff, and Adam Hahn.