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Cola Poster - .Theresultsshowedthe wastakenat.

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Discussion The lab began with the calculation of the percent transmittance and absorbance of  the colored dyes and KMnO4 through the use of the spec 20. The results showed the  relation between the percent transmittance and absorbance and the wavelength the data  was taken at. This is because certain colors in the visible spectrum absorb different colors  of light. The object appears to be red when all of the colors of the visible spectrum are  absorbed besides red. Red on the other hand is reflected from the object and seen by the  human eye. Thus, the object itself is not red it rather reflects red.  After all the graphs and data were collected, this information was used to decide the  approximate wavelength in which to use in further experiments.  550 nm was decided to  be around the correct wavelength to conduct the experiment through the use of Figure 6.  The wavelength of 550 nm was chosen because it was the peak wavelength on the  absorbance graph.  This peak is the ideal choice for choosing the analytical wavelength  because it provides the most accurate and precise measurements later down the road.  This allows spectrometer error with minimal absorbance change. The KMnO4 needed to  be diluted into different concentrations in order to develop a calibration curve at the  desired 550nm wavelength.  The solution was diluted to molarities of .0002, .00032, . 000444, and .0005. This concluded that phase of the experiment. The next goal of the experiment was  to create a calibration curve for the colas and to finally discover the phosphate content of  those colas. In order to create a calibration curve, a solution with a known concentration of  phosphate needed to be used. For this experiment K 2 H(PO 4 ) was used. Unfortunately, this 
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