4. When a secondary battery provides electrical energy, it is acting as a voltaic cell. When the battery is recharging, it is operating as a(n) _____ cell.

Answer:

6. Calculate the copper(II) ion concentration at 25 °C in the cell Zn(s) | Zn2+(aq, 1.0 M) || Cu2+(aq) | Cu(s) if the measured cell potential is 1.06 V. The standard cell potential is 1.10 V.
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