* The Reactivity Series: Copper is less reactive than aluminum. This means that copper cannot displace aluminum from its salt solution.
* Redox Reactions: For a reaction to occur, there needs to be a transfer of electrons. In this case, copper would need to lose electrons (oxidation) and aluminum would need to gain electrons (reduction). Since copper is less reactive, it's less likely to lose electrons and react.
In summary: The copper metal will simply remain in the aluminum sulfate solution without any noticeable reaction.
