Chem Lab 4 - Experiment#4 Spectroscopy in Quantitative...

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Experiment #4 Spectroscopy in Quantitative Analysis: Iron in a Vitamin Tablet Abstract In this experiment, the amount of iron in a vitamin tablet was determined through analysis of light absorbance and concentration using a Beer’s Law plot. Standard solutions of known concentration were prepared and a spectrophotometer was used to determine the light absorbance for that particular iron concentration. This data was used to construct a Beer’s Law plot, and the graph was interpolated using the absorbance of the unknown solution to find the concentration. The iron concentration was then used to calculate the mass of iron in the tablet, which was determined to be . The advertised amount of iron per tablet is 27 mg. This means that there is a difference between the experimentally determined mass of iron per tablet and the advertised value. Results mass of vitamin tablet = 1.7685 g ± 0.0001 g mass of iron per tablet = 27 mg iron concentration = 0.1000 g/L mass of beaker = 60.4215 g +tablet = 61.4540
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Chem Lab 4 - Experiment#4 Spectroscopy in Quantitative...

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