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Question
State your observation when the following is exposed to the atmosphere.
Washing soda crystals
Solution
When washing soda (Na2CO3.10H2O) is exposed to air, it loses 9 molecules of water to form a monohydrate and a fluffy white deposit is formed on the surface of crystals
\[\ce{Na2CO3.10H2O →[air] Na2CO3.H2O + 9H2O}\]
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