Universal indicator added to two beakers containing different solutions (left to right): acidic (vinegar),and alkaline (baking soda). The indicator changes the solution's colour,depending on it's pH | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 5094 px × 3400 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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