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Question
State what would you observe when :
Washing soda crystals are exposed to the atmosphere.
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Solution
When washing soda (Na2CO3.10H2O) is exposed to air, it loses 9 molecules of water to form a monohydrate.
\[\ce{Na2CO1.10H2O ->[air] Na2CO1.H2O + 9H2O}\]
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