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The d- and f-Block Elements
Oxidation States and Stability of Ions in Aqueous Solution
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Concepts tested
- stability of Cu(II) in water
All Questions
2023 1 question
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The stability of $Cu^{2+}$ is more than $Cu^+$ salts in aqueous solutions due to:
$\Delta_{hyd}H$ of $Cu^{2+}$ is much more negative than that of $Cu^+$.
The greater stability of $Cu^{2+}(aq)$ rather than $Cu^+(aq)$ is due to the much more negative $\Delta_{hyd}H$ of $Cu^{2+}(aq)$ than $Cu^+$, which more than compensates for the second ionisation enthalpy of Cu.