MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Copper sulphate solution. Solution of copper (II) sulphate (CuSO4, blue) in a beaker with a glass rod. Copper (II) sulphate is very soluble in water. The blue colour is due to the formation of a hydrated complex of the copper ion with the water molecules.
Model release not required. Property release not required.