MODEL RELEASED. Pupil performing titration. Schoolgirl dripping measured volumes of an acid from a burette (down right). The conical flask (lower right) contains a measured volume of an alkali and the indicator methyl red. As the acid & alkali mix they change the pH of the solution,resulting in a change in the indicator's colour. The yellow colour of the solution in the conical flask indicates that it has a pH above six,and is alkaline | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Chillmaid, Martyn F. |
Bildgröße: | 3582 px × 4958 px |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |