Chem152_Calib_Report_2DONE

Chem152_Calib_Report_2DONE - Name Efrain Montes ID Number...

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Name: Efrain Montes Section: AT ID Number: 1131865 Lab Partner: Austin Total Points = 60 pts (5 pts notebook, 55 pts template) DATA, GRAPHS AND CALCULATIONS 511.88 nm 1 pt Creating the calibration curve: Ferroin: Concentration (M) Absorbance 1.25E-05 0.070 2.50E-05 0.230 2 pts 3.75E-05 0.380 5.00E-05 0.530 6.25E-05 0.600 4 pts Slope of Absorbance versus concentration graph 10880 1 pt y-intercept of Absorbance versus concentration graph -0.046 1 pt Detailed calibration equation: A = 10880x - 0.046 2pts Determining theAmount of Iron in an Iron Tablet 1) Average mass of a tablet 436 mg (provided in manual) 2) Mass of crushed tablet used in analysis 22 mg 1 pt 3) Final volume after filtered crushed tablet solution 100 mL is diluted in volumetric flask (lab manual Part I , Step 5) 4) Volume of diluted crushed tablet solution 5 mL transferred to the new volumetric flask 5) Final volume of ferroin complex solution 100 mL (end of lab manual Part I , Step 9) 6) Absorbance of the ferroin complex solution 0.090 1 pt (lab manual Part I I, Step 3) 7) 3 pts 8) 2 pts 9) 3 pts 10) 2 pts 11) 3 pts 12) mg of iron per tablet as listed on the bot le 27 mg λ max: M -1 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 wil be made? [Do not provide experimental details here]. How do you go from calculated/measured values to accomplishing stated purpose? ( 10 pts: roughly divided 1 for the goal and 3 each for addressing each of the three parts of the experiment. ) The purpose of this lab is to understand Beer's law by measuring the concentration of an unknown solution using spectral analysis and calibration curves and measuring the amount of ferroin in a tablet to find the amount of iron in a whole tablet. This is accomplished by determining the concentration of ferroin and using that to calculate the mass of iron in a tablet. Using the
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