Explain why `Cu^(+)` ion is not stable in aqueous solutions ?

Explanation

To explain why the `Cu^(+)` ion is not stable in aqueous solutions, we can break down the reasoning into several steps:

### Step 1: Understanding the Stability of Copper Ions
Copper can exist in two oxidation states in aqueous solutions: `Cu^(+)` and `Cu^(2+)`. Among these, `Cu^(2+)` is known to be stable in aqueous solutions.

### Step 2: Energy Considerations
The formation of `Cu^(2+)` from elemental copper (`Cu`) requires an input of energy. This is because removing an electron from a neutral copper atom to form a `Cu^(+)` ion requires energy, and further removing another electron to form `Cu^(2+)` also requires energy.

...