Question

Anhydrous substance is the one that does not contain ________.

Answer 1

Water of crystallization-

• It is also called water of hydration.
• It is the amount of water molecules that are chemically attached to the compound in its crystalline form.
• It is represented by the dot after the chemical formula.
• It is also responsible for the shape and size of crystals.
• Crystals are loosely attached to the compound and lost on heating.

Examples-

• Copper sulphate crystals (${\mathrm{CuSO}}_4.5{\mathrm{H}}_2\mathrm{O}$)
• Iron sulphate crystals (${\mathrm{FeSO}}_4.7{\mathrm{H}}_2\mathrm{O}$)

Hence,

Anhydrous substance is the one that does not contain water of crstallization.