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Question
What happen to the crystals of washing soda when exposed to air? Name the phenomenon exhibited.
Solution
When washing soda crystals are exposed to air, they lose their water of crystallisation, a phenomenon known as efflorescence.
\[\ce{\underset{Washing soda}{Na2CO3.10H2O} ->[\Delta]\underset{carbonate}{\underset{Sodium}{Na2CO3}} + 10H2O}\]
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