MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Copper sulphate formation. Spatula being used to add copper (II) oxide to warm dilute sulphuric acid. This reaction forms copper (II) sulphate (blue) and water. The copper (II) oxide is an insoluble solid (black), while the copper (II) sulphate is soluble in water.
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