Lab report 9

Lab report 9 - Emission Spectra (Lab #9) Jesse LaSalle TA:...

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Emission Spectra (Lab #9) Jesse LaSalle TA: Jimmy Martin Experiment Completed: November 15, 2007 Report Submitted: November 29, 2007
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I) Purpose : Observing spectra of emission from hydrogen and helium, and using these observations to determine transitions of energy responsible for line spectra in hydrogen. II) Procedure : Casey, J. and R. Tatz (2008). Emission Spectra. . General Chemistry Laboratory Experiments , Hayden McNeil. Vol.1: 89-98. III) Data : (See attached report form.) IV) Calculations : Energy of emitted hydrogen photon, color: red. = E hcλ = . - * . . - E 6 26x10 34 2 998x108649 2x10 9 = . - E 3 060x10 19J Energy level transition of red emitted photon. . - = - 9 112x10 8 λ 1nf2 1ni2 . - . - 9 112x10 8649 2x10 9 - = . 1nf2 1ni2 0 1405 This number is close to 0.13889, so the transition can be approximated as an n=3 to n=2 transition. V) Error analysis/Conclusion: This laboratory experiment had very few potential sources of error. When reading the scale measurements for the various lines, it is possible that some had been misread. One line
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Lab report 9 - Emission Spectra (Lab #9) Jesse LaSalle TA:...

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