Litmus test on an orange. A piece of red litmus paper held against a freshly-cut face of an orange. The lack of change of colour means that the orange must be either acidic or neutral. Oranges,like all citrus fruits,contain citric acid | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4181 px × 4181 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |