WAEC - Chemistry (2023 - No. 45)
An example of a crystalline substance that does not possess water of crystallization is
potassium trioxonitrate (V)
sodium tetraoxosulphate (VI).
iron (II) tetraoxosulphate (VI)
sodium trioxocarbonate (IV).
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The chemical formula for sodium tetraoxosulphate (VI) is \(Na_2SO_4\). It is also known as sodium sulfate. This compound does not have any water molecules as part of its crystal structure, making it anhydrous. So, it is an example of a crystalline substance that does not possess water of crystallization.