Hydrating copper sulphate

Hydrating copper sulphate

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Caption: Hydrating copper sulphate. Image 2 of 3. Copper sulphate crystals (CuSO4) have a blue colour, but this is due to the presence of water of crystallisation within the molecular structure of the crystals. The anhydrous form is white (lower left). Hydrated copper sulphate has the formula CuSO4.5H2O. Heating removes the five water molecules (H2O), leading to the colour being lost. The process is reversible, and the addition of water to the anhydrous crystals restores their blue colour. For a sequence showing the addition of water to these crystals, see images A500/380- 382.

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Keywords: anhydrous, chemical, chemistry, compound, copper sulphate, crystal, crystals, dehydrated, dry, equipment, experiment, glassware, horizontal, hydrated, hydrating, laboratory, metal, salt, solid, substance, test tube, water of crystallisation, white

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