Quant Lab7.docx - Determination of Fe by UV-Vis...

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Determination of Fe by UV-Vis Spectroscopy-ModifiedAnalysis Identifying InformationFile Number: 7Analyst: Obinna EmehAgency: The Department of Chemistry and Biochemistry, Lamar UniversityAddress: PO Box 10022, Beaumont, TX 77710-0022Date: November 15, 2017Sample Identifying InformationSample Number: 7Received Date: November 15, 2017Requester Name: Dr. Richard LumpkinBackgroundWe were provided with a complex of iron(II) formed with 1,10-phenanthroline, Fe(C12H8N2)32+ and a spectrophotometer to measure the absorbance of the colored solution over a range of wavelength.Materials: 1,10-phenanthroline solution, standard iron(II)stock solution, Hydroxylammonium chloride solution, NaC2H3O2solution, and 12mL unknown for each group.Test Method and Results1.Pipet 5, 10, 15, 20 and 25mL of standard iron(II) stock solution respectively from the volumetric flask in the order presented.2.Add 50mL of distilled water into 6thflask to serve as blank (no iron concentration). Obtain 12mL unknown sample and insert into the 7thflask.

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