Question

What does the solubility of s block halides in water depend upon?

Answer 1

Solubility of Ionic compounds:

• The solubility of ionic compounds depends upon two factors:

1. Lattice Energy
2. Hydration Energy

Lattice energy:

• The energy that is required to convert one mole of an ionic solid into gaseous ions, the energy is known as Lattice energy.
• When the lattice energy is higher, the melting point of s block halides is also high due to which the solubility of the halides in water decreases.

Hydration energy:

• The amount of energy that is liberated when one mole of gaseous ions combines with water to form hydrated ions, the energy is known as Hydration energy.
• The smaller the ion’s size, the greater its hydrated ionic radius, as a result, the ionic mobility is less.