Testing toothpaste for alkalinity. Litmus indicator changes its colour depending on the pH. Here a litmus indicator paper strip has changed colour from red to blue after coming in contact with toothpaste that contains sodium bicarbonate (NaHCO3). The test shows that the toothpaste is alkaline. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Turtle Rock Scientific |
Bildgröße: | 5166 px × 3438 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: |
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