Testing apple for acidity. Litmus indicator changes its colour depending on the pH. Here a litmus indicator paper strip has changed colour from blue to pink after it was put in contact with a freshly sliced apple. The test shows that apple 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 : | - |