differentiate between deliquescent and efflorescent substance
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Deliquescence , the process by which a substance absorbs moisture from the atmosphere until it dissolves in the absorbed water and forms a solution.Deliquescence occurs when the vapour pressure of the solution that is formed is less than the partial pressure of water vapourin the air. All soluble salts
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Deliquescence refers to a process whereby a highly hygroscopic substance absorbs water from the atmosphere to such a degree that the substance actually dissolves in its own sorbed water (e.g. NaCl above 73%RH).
Efflorescence refers to a process whereby a salt present within a porous material is first dissolved by sorbed water and then transported to the surface of the porous material where the salt then precipitates out of solution. This leaves a coating of the salt present on the surface of the porous material (e.g. bricks on old buildings
Efflorescence refers to a process whereby a salt present within a porous material is first dissolved by sorbed water and then transported to the surface of the porous material where the salt then precipitates out of solution. This leaves a coating of the salt present on the surface of the porous material (e.g. bricks on old buildings
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