Alkaline solution being added to a flask containing universal indicator solution. The blue colour indicates alkalinity,the yellowish colour is neutral | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4500 px × 4552 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |