Hydration Enthalpy of alkaline earth metal
- The energy released as a result of the formation of new bonds between ions and water molecules is called hydration enthalpy.
- Hydration enthalpiesof alkaline earth metal ions decrease with the increasing ionic size down the group.
- Hydration enthalpies of alkaline earthmetal ions are larger than those of alkali metal
- MgCl2 and CaCl2 exist as hydrates in the form of MgCl2.6H2O and CaCl2 6H2O.