Litmus test on a lemon. A piece of red litmus paper held against a freshly-cut face of lemon. The lack of change of colour means that the lemon must be either acidic or neutral. Lemons,like all citrus fruits,contain citric acid | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4252 px × 4252 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |