Spectrochemical

Spectrochemical - known to increase in the following order...

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The Spectrochemical Series Lab Instructor: Dan Mack 11/28/07
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Results and Discussion: An unknown cobalt complex was synthesized and purified. It and four other unknown cobalt complexes were then exposed to energy, the effects of crystal field splitting were observed, and the wavelength emitted was then measured using a spectrophotometer. Cobalt Compound Wavelength (nm) Color Absorbs Color Appears A 530.82 Green Red B 474.34 Green Red C 513.26 Green Red D 556 Blue Orange E 448.74 Blue Orange Crystal field splitting, which is responsible for the color that each compound appears, is
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Unformatted text preview: known to increase in the following order if the metal ion is kept constant: Br-< Cl-< F-< H 2 O < NH 3 Therefore, the identity of each unknown complex was determined by arranging them by decreasing wavelength, D > A > C > B > E because energy (crystal field splitting) is inversely related to wavelength according to ∆ o = hc l . Conclusion: It was concluded that A was [Co(NH 3 )Cl] 2+ , B was [Co(NH 3 )H 2 O] 3+ , C was [Co(NH 3 )F] 2+ , D was [Co(NH 3 )Br] 2+ , and E was [Co(NH 3 )NH 3 ] 3+ ....
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This lab report was uploaded on 02/14/2008 for the course CHEM 2070 taught by Professor Chirik,p during the Fall '05 term at Cornell.

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Spectrochemical - known to increase in the following order...

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