Hydrated Salts

  Certain Salts contain definite amount of some H2O molecules loosely attached to their own molecules. These are known as Hydrated salts and are of crystalline nature . The molecules of H2O  present in water are known as 'water of crystallisation'  .  TYPES OF HYDRATED SALTS  Efflorescence salts  Certain hydrated salts when exposed to atmosphere at ordinary temperature , lose their water of crystallisation molecules either partially or completely and become anhydrous. These are known as efflorescent salts and this property is known as efflorescence. It increases under dry weather conditions and in summer when ordinary temperature is quite high.  examples- Washing soda , epsom salt and blue vitriol  Deliquescence salts  Certain substances have the property to absorb moisture when exposed to atmosphere at ordinary temperature. They initially become wet , lose their crystalline forms and ultimately dissolve in absorbed water to form a solutio...