Chem lab report_Optical spectroscopy

Chem lab report_Optical spectroscopy - The Spectrochemical...

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The Spectrochemical Series November 25, 2007
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Results and Discussion: Purpose : To synthesize one of 2 unknown cobalt complexes (A or B). To purify the cobalt complex and measure wavelengths of maximum absorbance of 5 cobalt complexes: the one synthesized by your group (A or B), and 3 other cobalt complexes (C, D and E). Use the data and spectrochemical series to determine the identities of each cobalt complex. Week 1: First, the mass of a 5 dram vial was measured on an electronic balance. Mass 5 dram vial = 16.413 g Next, a mass of about 5 g cobalt salt was measured on an electronic balance. Mass of cobalt salt = 5.004 g cobalt salt. The cobalt was dissolved in 7 mL H2O in a 50 mL beaker. Then, about 16 g of NH4Cl was measured on an electronic balance. Mass NH4Cl = 16.003 g NH4Cl. The NH4 Cl was placed in a large casserole with 16 mL NH4OH and the cobalt solution created in the previous step. 4 mL of water was obtained and was added in small portions while stirring to the casserole. The observations and calculated results were tabulated (Table 1). Next, the casserole was placed in a steam bath for 30 minutes with occasional stirring. Then it was cooled to room temperature in an ice-water bath. The observations and
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This note was uploaded on 03/26/2008 for the course CHEM 2080 taught by Professor Davis,f during the Spring '07 term at Cornell.

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Chem lab report_Optical spectroscopy - The Spectrochemical...

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