Timeline for What causes the colour when conducting flame tests on solid salts?
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| Sep 1, 2017 at 13:46 | history | edited | Mithoron | CC BY-SA 3.0 |
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| Jan 15, 2015 at 12:27 | comment | added | permeakra | @ChrisA As for excitation mechanism, it is plainly too hard to give a definitive proof, since there is a lot of flames. However, visible light quants have energies 1.6+ eV, which corresponds to 15 000 + Kelvin. | |
| Jan 15, 2015 at 12:22 | comment | added | permeakra | @ChrisA Yes. Emission lines discoverable through flame test are ridiculously intensive, and, given that there is no much energy released in visible light by non-sooting flames, it is quite easy to color the flame. Non-zero vapor pressure may exist even over solid, say ice slowly evaporates (sic!) in very dry air even set below freezing point. However, since emission lines to be active in flame test must be ridiculously intensive, there is only a few elements active in flame test. | |
| Jan 15, 2015 at 9:06 | comment | added | ChrisA | Thanks for the reply. However, I'm troubled by "more or less generally accepted" and "believed to be". See my edit - I'm throwing a sprinkling of solid salt into the part of the flame that's well below the boiling point. Are free sodium and potassium atoms really credible as the source of the flame colours? | |
| Jan 14, 2015 at 8:40 | history | edited | permeakra | CC BY-SA 3.0 |
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| Jan 14, 2015 at 8:32 | history | answered | permeakra | CC BY-SA 3.0 |