(B) $CuCl_{2}$ is more stable in aqueous solution. This is because the high negative hydration enthalpy of $Cu^{2+}$ ion compensates for the energy re

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$CuCl_{2}$ is more stable due to the higher hydration enthalpy of $Cu^{2+}$ ion.

(B) $CuCl_{2}$ is more stable in aqueous solution. This is because the high negative hydration enthalpy of $Cu^{2+}$ ion compensates for the energy required to remove the second electron from $Cu^{+}$ to $Cu^{2+}$,making $Cu^{2+}$ more stable than $Cu^{+}$ in aqueous medium.

Class 12 Chemistry The d- and f-Block Elements General Characteristics

Medium

Out of $Cu_{2}Cl_{2}$ and $CuCl_{2}$,which is more stable and why?

A
$Cu_{2}Cl_{2}$ is more stable due to its $d^{10}$ configuration.
B
$CuCl_{2}$ is more stable due to the higher hydration enthalpy of $Cu^{2+}$ ion.
C
Both are equally stable.
D
Stability depends on the solvent used.