Testing toothpaste for alkalinity. Universal indicator changes its colour depending on the pH. Here a universal indicator paper strip has changed colour from yellow to blue-green after coming in contact with toothpaste that contains sodium bicarbonate (NaHCO3). The test shows that the toothpaste is slightly alkaline. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Turtle Rock Scientific |
Bildgröße: | 5168 px × 3445 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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