Universal indicator pH scale. The pH scale measures the strength of an acid or alkali. When universal indicator is added to a solution,it changes colour depending on the solution's pH. The tubes contain solutions of pH 0 to 14 from left to right. Acids increase in strength from pH 6 to pH 0,and alkalis increase in strength from pH 8 to pH 14. The green tube (centre) is neutral,pH 7. For a colour-enhanced version of this image,see A500/427 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Andrew Lambert Photography |
Taille de l’image : | 4077 px × 3115 px |
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Property Release : | Non requis |
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