Universal indicator solution being pipetted into an acidic solution. Universal indicator changes colour in acidic or alkaline solutions,turning red or blue respectively | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Andrew Lambert Photography |
Taille de l’image : | 3667 px × 4768 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |