Explain with examples: Efflorescence?

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Solution

Efflorescence is the property of a substance to lose wholly or partly its water of crystallization when its crystals are exposed to dry air for a short time.They become powdery such substance are called efflorescent substance.The process is efflorescence.
Example:
Washing Soda(Na₂CO₃.10H₂O)
When hydrated sodium carbonate is exposed to dry air , it becomes a monohydrate.
Na₂CO₃.10H₂O (Dry Air) ⇢ Na₂CO₃.H₂O (s)+ 9 H₂O(l)

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