Performing a calcium flame test on chalk
Numéro d’image : 11520461
| Performing a flame test (orange) on chalk. A flame test is a simple way to test for the presence of certain metals in a compound,in this case calcium. A small amount of the sample is held in a Bunsen flame. Some metals can be detected by the colour of flame produced. The colour of the flame is caused by the fluorescence of the metal ions within it; the compound is ionised by the heat and the excited metal ions give out light of a characteristic wavelength or colour. Chalk,a form of calcium carbonate,gives a characteristic dull orange flame. Smaller samples are held on a platinum wire as it does not give a flame test colour of its own | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Mason, Jerry |
| Taille de l’image : | 2543 px × 3392 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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