Universal indicator paper being used to test the pH of dilute sulphuric acid (in beaker). The paper has turned red,indicating a pH of 1 - 2 (as shown on the comparison strip) and a strong acid | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Trevor Clifford Photography |
Taille de l’image : | 3872 px × 2592 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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