In other words, any metal that is higher in the activity series can displace other metal that is placed lower in the activity series, from its compound. Example 1, 2Al + Fe 2 O 3 → Al 2 O 3 + Fe. Al (-1.66 V) has higher oxidation potential than Fe (- 0.44 V) and displaces Fe to form Al 2 O 3. Example 2, Mg + CuSO 4 → MgSO 4 + Cu.
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