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Unformatted text preview: ance of the mixture
at the wavelength of maximum absorbance found for the red solution in Part I. (You
should have a total of 2 readings.)
Clean-up: The contents of the test tubes must be discarded to the waste container
labeled Cobalt waste. 61 DATA ANALYSIS
Part III. Making the Beer's Law Plots.
Overview and a Modest Theoretical Excursion: In this part of the experiment you will
manipulate the data collected in Part III to obtain the values of effective molar
absorptivity, symbolized by *, for both the red and the green complexes at the two
wavelengths of interest here. Beer's Law in the form in which you have seen it previously, A = ℓC, strictly applies
only to a slender beam of monochromatic light passing through a cell with flat, parallel
windows. In the present experiment the light beam is not small and the cell is not a
rectangular parallelepiped, so the path length, ℓ, cannot be defined.
Operationally, the detector outputs a signal that is the average of the exit intensity over
the cross section of the cylindrical cuvette. If...
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This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.
- Spring '07