Testing lemon for acidity. Universal indicator changes its colour depending on the pH. Here a universal indicator paper strip has changed colour from yellow to red after it was put in contact with a freshly sliced lemon. The test shows that lemon is acidic. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Turtle Rock Scientific |
Taille de l’image : | 4888 px × 3411 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |