Question: Data analysis 1 Prepare two calibration plots of absorbance vs. concentration of your standard zinc solutions. The first one should include all data points. The second should be expanded to include only the data in the linear region. Least-squares analysis is required only for the second plot. Be sure to blank correct all absorbances before graphing. 2

EngineeringChemical EngineeringChemical Engineering questions and answersData analysis 1 Prepare two calibration plots of absorbance vs. concentration of your standard zinc solutions. The first one should include all data points. The second should be expanded to include only the data in the linear region. Least-squares analysis is required only for the second plot. Be sure to blank correct all absorbances before graphing. 2Question: Data analysis 1 Prepare two calibration plots of absorbance vs. concentration of your standard zinc solutions. The first one should include all data points. The second should be expanded to include only the data in the linear region. Least-squares analysis is required only for the second plot. Be sure to blank correct all absorbances before graphing. 2This question hasn’t been solved yetAsk an expertAsk an expertAsk an expert done loading35b

Show transcribed image textExpert Answer Who are the experts?Experts are tested by assignmentguruh as specialists in their subject area. We review their content and use your feedback to keep the quality high.Transcribed image text: Data analysis 1 Prepare two calibration plots of absorbance vs. concentration of your standard zinc solutions. The first one should include all data points. The second should be expanded to include only the data in the linear region. Least-squares analysis is required only for the second plot. Be sure to blank correct all absorbances before graphing. 2 Determine the zinc concentrations of your unknown from the calibration plot. Using LINEST, estimate the error in the concentration of the unknown determined using these data. 3 Prepare an appropriate standard additions plot for the unknown sample and determine the concentration of Zn by this method. Remember that in this analysis, the total volume of the solution increased as the additions were made. 4 Calculate the average zinc concentration in determined by the calibration plot method and the overall average value and percent RSD of a calibration plot and standard additions methods. Target std conc 0.1 0.5 1 2 4 5 blank Actual std cons made. 0.1 ppm 0.5ppm 1.003ppm 2.006ppm 4.013ppm 5.017 Vol stock (ml) Vs(5.017-(0.1) (50ml) Vs=(5,017=(0.5) (50ml) Iml 2ml 4ml 5ml 1ml 0.IM HNO3 DI to 50ml Unkn external std V stock-100ml Zn 1.0034 g/L Std Addition Vs-25ul Vs-50ul Unkn #6 V unkn-2.0ml Unkn DI to 100ml Vo=25 ml Vo-25ml Vt-0.000025 V1=0.000025 A CONC ppm blank А 0 0.100000001 0.5 1.00300002 2.00600004 4.01300001 5.0170002 0.001017002 0.001484189 0.000650107 0.001661148 0.001331635 0.001820513 0.002182844 0 0.000467187 -0.000366895 0.000644146 0.000314633 0.000803511 0.001165842 CONC. remove outliers ppm blank А A 0 0.001017002 0.1 0.001484189 1.003 0.001661148 2.006 0.001331635 4.013 0.001820513 5.017 0.002182844 0 0.000467187 0.000644146 0.000314633 0.000803511 0.001165842 External Std Callibration curve Linear External std Callibration curve 0.0014 0.0012 A=0.0002 Concil + 7E-05 R 0.5075..*** A-0.0002Conct) + 0.0002 R=0.7015 0.001 . nk corrected Absorbance 0.0008 0.0014 0.0012 0.001 0.0008 0.0006 0.0004 0.0002 0 -0.0002 0 -0.0004 -0.0005 0.0006 0.0004 2 5 0.0002 Concentration ppm 0 1 1 2 3 4 5 6 Vertical (Value) Axis Minor Gridlines Concentration ppm Previous question