Chem152 LAB REPORT 2 - Name and ID Number: Section: Lab...

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Name and ID Number: Section: Lab Partne Total Points = 60 pts (5 pts notebook, 55 pts template) DATA, GRAPHS AND CALCULATIONS 1 pt Creating the calibration curve: Ferroin: Concentration (M) Absorbance 1.25E-05 -0.130 2.50E-05 0.250 2 pts 3.75E-05 0.390 5.00E-05 0.500 6.25E-05 0.660 Purpose and Method Clearly state the purpose of this part of the lab. 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 stated purpose? ( 10 pts ) In this lab, standard solutions will be prepared from a stock solution. The solutions derived from this process will then be used to create a calibration curve to determine the molarity of an unknown solution. Standard solutions of ferroin solutions will be prepared, using distilled water to dilute the stock solution, The absorbance of these solutions will then be determined. The concentration of ferroin in the solution will be determined through the calibration curve created comparing absorbance to known concentrations and the absorbance of a prepared ferroin solution. (XmL*1L*Xmoles)/1000mL= moles of ferroin λ max = 510.10 nm Experiment 2 : Calibration Curves and an Application of Beer's Law By signing below, you certify that you have not falsified data, that you have not plagiarized any part of this lab report, and that all calculations and responses other than the reporting of raw data are your own independent work. Failure to sign this declaration will cost you 5 points. Signature:
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4 pts Slope of Absorbance versus concentration graph 14640 1 pt y-intercept of Absorbance versus concentration graph -0.22 1 pt Detailed calibration equation: y=14640x-0.215 2pts Determining theAmount of Iron in an Iron Tablet
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This note was uploaded on 10/26/2010 for the course CHEM 152 taught by Professor Chiu during the Fall '08 term at University of Washington.

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Chem152 LAB REPORT 2 - Name and ID Number: Section: Lab...

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