Looking for classes? Ksquare Career Institute, Bengaluru →
The stability of $Cu^{2+}$ is more than $Cu^+$ salts in aqueous solutions due to:
A
second ionisation enthalpy
B
first ionisation enthalpy
C
enthalpy of atomisation
D
hydration energy
Explanation
$\Delta_{hyd}H$ of $Cu^{2+}$ is much more negative than that of $Cu^+$.
Detailed Solution
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.