Preparing a solution. Water from a wash bottle being used to top up a solution of iron (II) sulphate to the mark engraved in the neck of a volumetric flask. The green colour arises from the transition metal ion present here,in this case iron. The Fe ion is in its +2 (II) oxidation state,and is forming a hydrated complex ion structure with molecules of water. Iron (II) sulphate is used as a food additive and as a dye | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Chillmaid, Martyn F. |
Taille de l’image : | 4558 px × 3852 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |