Question

Substances that contain water molecules within them are referred to as substances _________________ (hydrated/anhydrous).

Answer 1

Hydrated Substances:

• Substances that contain water of crystallization in them are referred to as hydrated substances.

Examples:

• Magnesium sulphate (MgSO4.7H₂O): Epsom salt
• Ferrous sulphate (FeSO4.7H₂O): Green vitriol
• Copper (II) sulphate (CuSO4.5H₂O): Blue vitriol
• Calcium sulphate (CaSO, 2H₂O): Gypsum

Anhydrous Substances:

• Substances that do not contain water of crystallization in them are referred to as anhydrous substances.
• For instance, when we heat copper sulphate crystals (CuSO4.5H₂O), the water molecules will get evaporated.
• The remaining salt without water is referred to as anhydrous salt. Now the anhydrous salt's formula will be CuSO4.