Explain why $Cu ^{+}$ ion is not stable in aqueous solutions?
Explain why $Cu ^{+}$ ion is not stable in aqueous solutions?
In an aqueous medium, $Cu ^{2+}$ is more stable than $Cu ^{+}$. This is because although energy is required to remove one electron from $Cu ^{+}$ to $Cu ^{2+}$, high hydration energy of $Cu ^{2+}$ compensates for it. Therefore, $Cu ^{+}$ ion in an aqueous solution is unstable. It disproportionates to give $Cu ^{2+}$ and $Cu$.
$2Cu_{(aq)}^ + \to Cu_{(aq)}^{2 + } + C{u_{(s)}}$
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