Universal indicator added to three test tubes containing different solutions (left to right): diluted hydrochloric acid (acidic),distilled water (weakly acidic) and diluted sodium hydroxide (alkaline). Universal indicator changes its colour depending on the pH of the solution. Red indicates a strong acid,yellow/orange indicates an acid,green is neutral,blue indicates an alkali,and purple indicates a strong alkali | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Giphotostock |
Bildgröße: | 3342 px × 4962 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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