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Davis Rhett DavisGen. Chem II LDr. LongoLab Partner: Christine CallahanJuly 9, 2015Spectrophotometric Determination of ManganeseData Table 1.Absorption vs. Wavelength for Maximum Absorbance DeterminationWavelength(nm)Absorbance400.496410.452420.416430.397440.370450.366460.381470.445480.548490.637500.803510.8625201.036530.985540.986550.873560.609570.532580.276590.152600.124610.107620.099630.089640.081Wavelength of Maximum Absorbance = ________520____nm
Davis This was decided as the wavelength of maximum absorbance because this is the wavelength which yielded the greatest absorbance.40045050055060065000.20.40.60.811.2Absorbance vs. WavelengthWavelength (nm)AbsorbanceData Table 2.Standard solutionsInitial buret reading (mL)Final buret reading (mL)Volume added (mL)Standard #11.0011.0110.01Standard #211.0130.9819.97Standard #31.2831.0029.72Standard #41.4241.1139.69Data Table 3.Unknown Number = ___104_______ Wavelength = _____520_nm_______Standard solutionsConcentration of KMnO4(M)AbsorbanceStandard #12.968 x 10-5.075Standard #2