Final answer:
In the given electrochemical cell setup, the copper-copper electrode combination generated the highest cell potential due to the reduction of Cu²+ ions to Cu at the cathode.
Explanation:
The copper-copper electrode combination produced the highest cell potential in the electrochemical cell scenario provided. In the cell setup, copper metal immersed in a 1 M Cu²+ solution acts as the cathode where Cu²+ ions are reduced to Cu. This reduction process results in a higher cell potential compared to other electrode combinations.
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