Chemistry - f-block Question with Solution | TestHub

The stability of${\mathrm{Cu}}^{2+} \left(\mathrm{aq}\right)$rather than${\mathrm{Cu}}^{+} \left(\mathrm{aq}\right)$is due to the much more negative${∆}_{\mathrm{hyd}}{\mathrm{H}}^{\mathrm{o}}$of${\mathrm{Cu}}^{2+} \left(\mathrm{aq}\right)$than${\mathrm{Cu}}^{+}$, which more than compensates for the second ionisation enthalpy of$\mathrm{Cu}$. The${\mathrm{Cu}}^{2+}$ion has a greater charge density than${\mathrm{Cu}}^{+}$ion and thus forms much stronger bonds releasing more hydration energy.