Phenolphthalein is used as a single indicator in acid-base titrations. In a base solution,as here at pH11,phenolphthalein is a pink colour. Adding a dilute acid turns it gradually colourless. At pH 9.3 the colour is barely perceivable and by pH 8 it is colourless | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Chillmaid, Martyn F. |
Bildgröße: | 3840 px × 5760 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |