Define the terms efflorescence and deliquescence.
Answers
Definition of efflorescence and deliquescent
Efflorescence
Efflorescence refers to the action of movement of salty liquids to the surface of a porous material, where the liquid evaporates leaving a white powdery coating on the surface.
This process leads to the powdery white coat normally seen on brick and rocks surfaces.
Deliquescence
This is the process by which a chemical substance absorbs moisture from the atmosphere and dissolves in it.
Deliquescence occurs when the vapour pressure of the formed solution is less than the partial pressure of water vapour in the atmosphere.
Answer:
Efflorescence is the property of some salts to lose wholly or partly their water of crystallization when their crystals are exposed to dry air even for a short time.
Deliquescent : certain water soluble substances when exposed to the atmosphere at ordinary temperature
, absorb moisture from the atmospheric air, and ultimately dissolve in the absorbed water, forming a saturated solution. Such substance is called a deliquescent substance