Universal indicator. Universal indicator was added to two test tubes containing sodium hydroxide solutions of different concentrations,resulting in different pH values. Left: pH=9 (weak base),right: pH=12 (strong base). Universal indicator changes its colour depending on the pH of the solution | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 3361 px × 5117 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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