Sodium flame test

Sodium flame test

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Credit: ANDREW MCCLENAGHAN/SCIENCE PHOTO LIBRARY.

Caption: Sodium metal flame test: a clean nichrome wire is dipped into a sodium salt solution (eg sodium chloride) and the wire introduced into a bunsen flame, which glows with a characteristic yellow flame. The flame is coloured due to the fact that the metal salt becomes vapourised in the flame and excited to emit radiations that are characteristic for that metal. The same phenomenon provides the basis for flame photometry, where intensity of emission indicates concentration of a particular metal in solution.

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Keywords: bunsen burner, chemical, chemistry, combustion, flame test, sodium flame test

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