1.

Give reasonWhy, when sodium carbonateis exposed to atmosphere itturns into a dull white powder

Answer»

Chemical formula of washing soda is Na2CO3.10 H2OWhen sodium carbonate crystals are exposed to air They lose water of crystallization and turn to white powder. This process of loosing water of crystallization when exposed to air is called efflorescence.

Na2CO3.10H2O → Na2CO3+ 10 H2O



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