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When sodium carbonate crystals are heated, their hydrated nature decreases. This is related to which idea?

Answer and explanation

Correct answer: Water of crystallisation

The governing concept is water of crystallisation, the definite number of water molecules chemically associated with some salt crystals. Washing soda is commonly represented as Na2CO3·10H2O. On heating, some or all of this crystallisation water can be removed, changing the hydrated salt into a less hydrated or anhydrous form. Heat of neutralisation, litmus change, and metal displacement describe different processes. Hence option A is correct.

Related tags

Water Of CrystallisationWashing SodaSaltsAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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