Water is added to dehydrated ground copper II sulphate pentahydrate, and it turns from greyish white back to blue. This is rehydration. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hutchings, Richard |
Taille de l’image : | 4088 px × 6144 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |