Chem152_Calib_Report - Name and ID Number Sienna Hiebert...

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Name and ID Number: Sienna Hiebert 0725998 Section: bb Lab Partner: Kaytlin Hopk Total Points = 60 pts Part I: Preparing Standard Solutions and a Calibration Curve DATA, GRAPHS AND CALCULATIONS 1 pt Concentration (M) Absorbance 1.25E-05 0.26 2.50E-05 0.39 3 pts 3.75E-05 0.56 5.00E-05 0.72 6.25E-05 0.9 Purpose and Method Part I: The purpose is to learn how to prepare standard solutions to generate a calibration curve. Explain how this is accomplished in this experiment. What calculations do you need to perform? What measurements will be made? [Do not provide experimental details here]. How do you go from calculated/measured values to accomplishing the stated purpose? ( 7 pts ) I prepared the standard solution by combing the values that i calculated in my prelab of volumes of solutions that would dilute the solution to a specified concentration. We used a precalculated amount of ferroin solution, which was added to a precalculated volume of DI water to produ standard soltions. In order to find the volume of each solution needed we used the definition of molarity= moles of solute per volume of solutio helped is determine the amount of each we would need to make certain standard concentrations. This way we could make a calibration cruve on those two quantities. We had to measure the volume of the water added and the volume of the ferroin standard solution added that would determine the predicted molarity of solution. We used a spectrophotometer to measure the absorbance of the solutions as well. We used thes values to create a calibration curve. Part II: The purpose is to determine mg Fe in a
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This note was uploaded on 04/07/2008 for the course CHEM 152 taught by Professor Chiu during the Winter '08 term at University of Washington.

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Chem152_Calib_Report - Name and ID Number Sienna Hiebert...

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