Testing solution for ph. Universal indicator changes its colour depending on the pH of the solution. Shown here is a universal indicator paper strip testing an unknown solution for pH. The strip colour (orange) is compared to the colour matching chart indicating pH value of about 3 (acidic solution) | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 5012 px × 3269 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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