More is the hydration enthalpy of an ion, more vigorously will it dissolve in water. Why is it so?
996Hydration energy (also hydration enthalpy) is a term for energy released upon attachment of water molecules to ions. It is a special case of dissolution energy, with the solvent being water.
For example, upon solving a salt in water, the outermost ions (those at the edge of the lattice) move away from the lattice and become covered with the neighboring water molecules due to high hydration energy . If the hydration energy is equal to or greater than the lattice energy, then the salt is water soluble...and if very high hydration energy then it dissolve very fast as its lattice energy would be very low
481Rahul-Remember:"For a salt to be soluble in water,the hydration energy must always be greater than its lattice energy"....And dats d only reason NaCl dissolves in water but not in organic solvent...becoz d lattice energy is more than d solvation energy [Hydration in case of water]
