What Is The Difference Between Efflorescence And Deliquescence?

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Solution

The difference between efflorescence and deliquescence is as follows,
Efflorescence Deliquescence
Efflorescence refers to losing the water of crystalline molecule when exposed to air at ordinary temperature. Deliquescence is the process by which a chemical substance aborbs moisture from the atmosphere and dissolved in it to form solution.
Efflorescence occurs when the aqueous vapour pressure of the hydrate is greater compared to the partial pressure of the water vapour in the air. Deliquescence occurs when the vapour pressure of the solution that is formed is less compared to the partial pressure of water vapour in the air.
Example: Washing soda(Na₂CO₃.10H₂O) which loses nine water molecule and after sometime loses all ten water molecule to convert in anhydrous form. Example: Sodium hydroxide(NaOH), Potassium hydroxide(KOH)

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Similar questions

(a) Define efflorescence. Give examples.

(b) Define deliquescence. Give examples.

Match the statements in column A with that in column B.

Column A Column B

(a) deliquescent substance (i)sodium bicarbonate

(b) hydroscopic substance (ii) magnesium chloride

(d) substance causing temporary (iv) washing soda hardness

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Efflorescence	Deliquescence
Efflorescence refers to losing the water of crystalline molecule when exposed to air at ordinary temperature.	Deliquescence is the process by which a chemical substance aborbs moisture from the atmosphere and dissolved in it to form solution.
Efflorescence occurs when the aqueous vapour pressure of the hydrate is greater compared to the partial pressure of the water vapour in the air.	Deliquescence occurs when the vapour pressure of the solution that is formed is less compared to the partial pressure of water vapour in the air.
Example: Washing soda(Na₂CO₃.10H₂O) which loses nine water molecule and after sometime loses all ten water molecule to convert in anhydrous form.	Example: Sodium hydroxide(NaOH), Potassium hydroxide(KOH)