Transcription of Beer's Law: Colorimetry of Copper(II) Solutions
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Beer's Law: Colorimetry of Copper(II) Solutions
Illinois Central College CHEMISTRY 130 Name:_____Beer's Law: Colorimetry of copper (II) SolutionsObjectivesIn this experiment, we will use Beer's Law to determine the unknown concentrations of Copper(II) Solutions by comparing the amount of light absorbed by the unknowns to the absorbtion of light by aseries of known compounds have been used extensively in the treatment of algae in municipal water supplyimpoundments. Consequently, recent indications that copper levels in the sediments of theseimpoundments are impeding plant growth have led scientists to more closely monitor copper levels innatural white light is passed through a solution containing a colored compound, certain wavelengths of lightare selectively absorbed (taken in). The resultant color observed is due to the transmitted light (lightwhich passes through).
and blue light is transmitted (Table 1). The amount of red light absorbed is directly proportional to the concentration of the copper (II) ions in the solution as defined by Beer's Law.
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