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Why can washing soda be called a hydrated salt?

Answer and explanation

Correct answer: Because it contains water of crystallisation

A hydrated salt contains a definite number of water molecules within its crystal structure. Washing soda is sodium carbonate decahydrate, Na2CO3·10H2O, so each formula unit is associated with ten molecules of water of crystallisation. Therefore, option A is correct. It is still an ionic salt; it is not merely water, ion-free, or a gas, as claimed by the other options.

Related tags

Washing-SodaHydrated-SaltWater-Of-CrystallisationClass10AcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And Behaviour

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