Base pH test. A universal indicator paper strip was dipped into 1M potassium hydroxide (KOH). Its colour changed to dark blue indicating a strongly alkaline solution. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 3426 px × 5158 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |