Recording emission spectra of a flame test

VC1.1.3.7
Recording emission spectra of a flame test
Recording emission spectra of a flame test Emission spectra of different metal salts
Recording emission spectra of a flame test

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Description

Spectral lines occur when electrons transition from higher to lower energy levels in the shell of excited atoms. The wavelength of the light emitted during the transition is determined by that energy differential:

Because the energies E1 and E2 can only take on discrete values, only photons with discrete frequencies are emitted or absorbed. Taken all together, the frequencies which occur are referred to as the spectrum of the atom. The arrangement of the spectral lines is characteristic for the element concerned.

Experiment C1.1.3.7 investigates flame colourations of metal salts. A compact spectrometer with a USB link to the computer makes it easy to record such transient events and to analyze the emission lines which are produced. Unlike in classical observation with the eye, lines in the IR range can also be identified, e.g. for potassium.

Components of equipment sets

1 467251  4  Compact spectrometer, physics (spectral photometer) LD
1 460251  8  Fibre holder LD
1 30011  8  Saddle base LD
1 666731  4  Gas igniter, mechanical LD
1 666960  4  Powder spatula, stainless steel, 150 mm LD
1 667089  4  Spotting tile LD
1 656017  4  Teclu burner, universal LD
1 607020  4  Safety gas hose with clamp 0.5 m LD
1 6730840  4  Magnesia rods, 25 pieces LD
1 665953  4  Dropping pipette, 7 x 150 mm, 10 pcs. LD
1 665954  8  Rubber bulbs, 10 pcs LD
1 661088  4  Salts for flame tests, set of 9 LD
GHS00 This product contains dangerous substances!
1 6746950  4  Hydrochloric acid, 0.1 mol/l, 500 ml LD
GHS05 Warning H290
1 additionally required:
PC with Windows XP/Vista/7/8/10 (x86 or x64)
1 additionally required: gas supply

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) C1.1.3.7 Recording emission spectra of a flame test
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