CHM201 General Chemistry and Laboratory I
Laboratory 8. Spectroscopy
Name
Group
PLEASE ENABLE EDITING BEFORE FILLING OUT THIS REPORT!No report will not be accepted for credit after that time.Grade:Lab average to date:Overall average to date:Results: (You may attach a copy of your group data.) (70 pts)1. Qualitative analysis:SourceObservationsFluorescentRoom LightsIncandescentLight Bulb2. Colored Light Bulbs:Incandescent Light BulbColorObservationsBulb #1Bulb #2
3. Discharge Tubes:
| Tube Contents | Observed Wavelengths of Discrete Spectral Lines |
| hydrogen | |
| helium | |
| neon | |
| mercury |
4. Wavelength of a Low Power Laser
| Observed Wavelength(s) of Discrete Spectral Line(s) |
| Description of the laser as compared to other line sources |
Questions: (30 pts)
1. Identify a light source that is continuous, one that exhibits line spectrums and one that shows both (if any). How many spectral lines were observed for each?
| Light Source | # of Spectral Lines |
2. Go online and find the spectrums for the four discharge tubes. Did your observations differ from these published data? If so, why do you think it differed? Record the url for the page you visited for each spectrum.
| Spectrum | Same? (Yes/No) | Reason |
3. Do a little investigation and explain ( briefly ) why the laser’s spectrum appeared as it did
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Observed Wavelengths of Discrete Spectral Lines