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What is hydration energy?

---Explain the hydration energy of metals with respect to the periodic table.

---Explain the hydration energy of non-metals with respect to the periodic tabe.

Hydration is the process of addition of water molecules to an  ion or molecule..

Hydration energy is  the amount of energy released when one mole of gaseous ions combine with water.

Hydration energy increases with decrease in the ionic size so..

  • Hydration energy of elements increases along the period while dereases down the group. This trend is same for metals and non metals both.

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Hydration enthalpy is defined as the amount of energy released when one mole of gaseous ions combine with water to form hydrated ions.
M+ (g) + aq → M+ (aq) + hydration energy
X- (g) + aq → X- (aq) + hydration energy
This hydration energy plays a very crucial role in determining the ionic mobilities of compounds.
Higher the hydration energy of the ions, greater is the solubility of the compound in water. Further, the extent of hydration depends upon the size of the ions. Smaller the size of the ion, more highly it is hydrated and hence greater is its hydrated ionic radius and less is its ionic mobility.
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Nice Akruti, Thumbs up for it, but I didn't get certain aspects as I desired to recieve.

Firsty, Hydration Enthalpy is the amount of energy released when 1 Mole of gaseous ions combine with water to form hydrated ions. Indirectly we can say that, hydrated ions are the gaseous ions of 1 mole reacting or combining with water to form a molecule. Is this correct?

My Doubt is: When we are considering gaseous ions (cations or anions), it co-relates with the non-metals since most of the non-metals include gaseous elements. But WAHT ABOUT METALS? Don't they have hydration state?

Hydration enthaly or energy, is the amount of energy released, but not energy required ?

 

 

 

 

 

Ny doubt is 

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