Universal indicator added to two test tubes containing different solutions. Left: neutral,right: alkaline. Universal indicator changes its colour depending on the pH of the solution. Red indicates a strong acid,yellow/orange indicates an acid,green is neutral,blue indicates an alkali,and purple indicates a strong alkali | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 3372 px × 4914 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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