Household toilet bowl cleaner containing 9.5% hydrochloric acid is tested for pH using blue litmus paper. The test strip changed its colour to red indicating an acidic solution | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Giphotostock |
Taille de l’image : | 3402 px × 5118 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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