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Optical Spectroscopy

Optical Spectroscopy - Optical Spectroscopy Gardner Yost...

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Optical Spectroscopy October 22, 2008 Gardner Yost Tyi MCcray
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Purpose: To observe spectra from a variety of sources using a spectrometer, to design and implement a procedure capable of determining the composition of a solution that contains two or more ionic salts, and construct a partial energy level diagram for hydrogen. Observations: Color with naked eye Wavelength with handheld spectrometer Wavelength with computer Incandescent bulb White 500nm 900, 800, 550nm Florescent bulb White 300, 500nm 386,402,446,469,491,502,585,730nm Helium Purple 600nm 386,402,446,449,502,585,668,708,73 0nm NaCl Yellow-Orange 200,220 nm 590.93nm LiCl Red-Pink 550nm 671.47nm CaCl Orange-Red 591nm 622.81nm SrCl Scarlet-Red 600nm 683.33nm NaCl +KCl Yellow N/A 589.87, 767.68nm Unknown 4 Yellow N/A 589.16, 767.16nm
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Hydrogen Pinkish 500nm 475.79,486,658nm Calculations: Percent error for unknown salt 1: (589.87-589.16)/589.87=.0012 Percent error for unknown salt 2: (767.68-767.16)/767.87=.0068 Energies for hydrogen: Sample Calculation for Hydrogen: 475.79nm=hcNa/E1 = -277.454 kJ/mol 486.3nm= hcNa/E2 = -246.324 kJ/mol 658.96nm=hcNa/E3 =-182.408 kJ/mol Evaluation of Results: What we can determine from this experiment is that, given the knowledge of
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