Demonstration of the colours of blue litmus indicator in first alkali (right) and then acid (left). The compound is blue in solutions with a pH above 8.3 (alkaline), and red in solutions below pH 4.5 (acidic). | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / RHYS LEWIS & MINH TAN PHAM, AHS, DECD, UNISA |
Modell-Rechte: | nicht erforderlich |
Länge: | 13 Sekunden |
Seitenverhältnis: | 16:9 |
Restrictions: | - |