A sample from a crime scene produced a lilac flame in a flame tes.why is the sample unlikely to contain sodium

please can you choose me as best answer cos i need points!

A sample from a crime scene produced a lilac flame in a flame tes.why is the sample unlikely to contain sodium
Sodium will give off a Yellow flame
Reply:Beacuse sodium burns with a yellow flame, not lilac.
Reply:If this is GCSE standard work, than the answer is as follows: the flame test for potassium produces a lilac flame and the flame test for sodium produces a yellow/orange flame. therefore there is unlikely to be any sodium present in the sample tested as lilac and yellow are very different colours, which personally i think would be hard to confuse. there would be potassium in the sample but no sodium.


if it is A level or IB standard work, than it is what the answer about wavelengths said. if it is GCSE, than ignore the wave length thing until sixth form. by wave length i mean spectral line
Reply:Sodium produces a very bright spectral line at about 590nm which is what you see in a flame test. It is so bright that it will totally obscure the much more subtle lilac response that you mentioned.



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