Lab3doc - Concentration and Spectroscopy Rolando Roesch...

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Concentration and Spectroscopy Rolando Roesch Elizabeth Small Michael Boys Andrew Luke Section: 010 Due: 09/22/08 Turned In: 09/22/08
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Objectives: To determine the concentrations of an unknown iron solution by obtaining wavelength and absorbance data with the use of a spectrophotometer. Procedure: “Concentration and Spectroscopy,” Chemistry 116 Laboratory Manual , Department of Chemistry, 2008, pg. 15. Data: Wavelength (nm) Absorbance 390 0.770 410 0.129 430 0.174 450 0.201 470 0.242 490 0.251 510 0.264 530 0.198 550 0.080 570 0.025 590 0.009 610 0.002 630 0.001 650 0.000 Standard Concentration (M) Absorbance at 510 nm 1 2.29e-5 0.264 2 4.47e-5 0.510 3 6.78e-5 0.760 4 9.00e-5 0.997 Absorbance at 510 nm Unknown Solution 1 0.751 Unknown Solution 2 0.765 Unknown Solution 3 0.775 Avg. Absorbance 0.764
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Data Analysis/ Calculations: Figure 1 Plot of absorbance versus concentration of Fe(phen) 3 2+ for the standard solutions. Molar Absorptivity (MA) of Fe(phen)
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This note was uploaded on 02/08/2011 for the course CHEM 116 taught by Professor Stevenson during the Spring '08 term at Purdue University.

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Lab3doc - Concentration and Spectroscopy Rolando Roesch...

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