MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Heating copper sulphate. Hydrated copper (II) sulphate (CuSO4, blue) that has been heated in a boiling tube with a bunsen burner flame. The water of hydration is released as water vapour (steam, condensing on the sides of the tube), leaving the anhydrous form of copper (II) sulphate (white).
Model release not required. Property release not required.