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For the cell Zn(s)|Zn^(2+)||Cu^(2+)|Cu(...

For the cell `Zn(s)|Zn^(2+)||Cu^(2+)|Cu(s)`, the standard cell voltage, `E^(c-)._(cell)` is `1.10V`. When a cell using these reagents was prepared in the lab, the measured cell voltage was `0.98V`. One possible explanatino for the observed voltage is

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