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Dehydration of copper (II) sulphate crystals

Dehydration of copper (II) sulphate crystals

A500/0206

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Credit

CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY CHARLES D. WINTERS / SCIENCE PHOTO LIBRARY

Caption

Dehydration of copper sulphate. Hydrated copper (II) sulphate crystals turning from blue to white when heated over a bunsen burner. Hydrated copper sulphate has a characteristic sky-blue colour. In the crystal structure, each copper sulphate mole- cule is associated with five water molecules (the water of crystallisation). When heated gently, the water is driven off, leaving a white powder called anhydrous copper (II) sulphate.

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