Question

The stability of Cu²⁺ is more than Cu⁺¹ salts in aqueous solution due to ______.

Options

• Enthalpy of atomization

• Hydration energy

• Second ionization enthalpy

• First ionization enthalpy

Answer 1

The stability of Cu²⁺ is more than Cu⁺¹ salts in aqueous solution due to hydration energy.

Explanation:

The chemical reaction can be given below:

\[\ce{Cu_{(s)} -> Cu_{(g)} -> Cu^+_{ (g)} -> Cu^{+2}_{ (g)} -> Cu^{+2}_{ (aq)}}\]

`ΔH_"atomisation"` IE₁ > IE₂ > Hydration energy

Cu²⁺ is more stable than Cu⁺¹ because released hydration energy is more in case of Cu²⁺ than Cu⁺¹.