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What is the chemical name of washing soda?

Answer and explanation

Correct answer: Sodium carbonate decahydrate

The governing concept is water of crystallisation in hydrated salts. Washing soda is sodium carbonate decahydrate, Na₂CO₃·10H₂O; the ten water molecules are part of its crystalline structure. This makes option C correct. Sodium chloride is common salt, sodium hydrogen carbonate is baking soda, and calcium sulphate hemihydrate is plaster of Paris. Heating washing soda can remove its crystallisation water and change its properties.

Related tags

Washing SodaSodium CarbonateWater Of CrystallisationAcidsBasesAnd SaltsAcids Bases And SaltsChemical Substances – Nature And BehaviourChemical Substances Nature And BehaviourScience

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