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Determine the initial [SCN1] in beakers 1-6. Refer to the Data Table for Part I for all volumes used. Assume for now that these [SCN1] values are equal to the equilibrium [FeSCN2] in beakers 1-6 because of the large excess of Fe*³ used. Prepare a graph of Absorbance vs [FeSCN+2]. Remember that according to the Beer-Lambert Law, this graph should be a straight line. Scale your graph so that the [FeSCN2] can be estimated to the nearest 0.01 x 104 M and so that your absorbance values can be estimated to the nearest 0.001. Beaker Volume of KSCN No solution 1 0.50 mL 9.50 mL Part I: Data for Calibration Graph Accurate Concentration of potassium thiocyanate, KSCN stock solution: 0.001 M 0.2 M Fe(NO3)3- Iron(III)nitrate solution: 0.5M Volume of HNO3 solution 0.2 M Volume of 0.2 M Fe(NO3)3 solution 10.00 mL Absorbance 0.037 2 1.00 mL 9.00 mL 10.00 mL 3 2.00 mL 8.00 mL 10.00 mL 4 3.00 mL 7.00 mL 10.00 mL 0.122 0.313 0.547 5 4.00 mL 6.00 mL 10.00 mL 6 5.00 mL 5.00 mL 10.00 mL 0.791 0.868

Determine the initial [SCN1] in beakers 1-6. Refer to the Data Table for Part I for all volumes used. Assume for now that these [SCN1] values are equal to the equilibrium [FeSCN2] in beakers 1-6 because of the large excess of Fe*³ used. Prepare a graph of Absorbance vs [FeSCN+2]. Remember that according to the Beer-Lambert Law, this graph should be a straight line. Scale your graph so that the [FeSCN2] can be estimated to the nearest 0.01 x 104 M and so that your absorbance values can be estimated to the nearest 0.001. Beaker Volume of KSCN No solution 1 0.50 mL 9.50 mL Part I: Data for Calibration Graph Accurate Concentration of potassium thiocyanate, KSCN stock solution: 0.001 M 0.2 M Fe(NO3)3- Iron(III)nitrate solution: 0.5M Volume of HNO3 solution 0.2 M Volume of 0.2 M Fe(NO3)3 solution 10.00 mL Absorbance 0.037 2 1.00 mL 9.00 mL 10.00 mL 3 2.00 mL 8.00 mL 10.00 mL 4 3.00 mL 7.00 mL 10.00 mL 0.122 0.313 0.547 5 4.00 mL 6.00 mL 10.00 mL 6 5.00 mL 5.00 mL 10.00 mL 0.791 0.868

Fundamentals Of Analytical Chemistry
Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter7: Statistical Data Treatment And Evaluation
Section: Chapter Questions
Problem 7.26QAP
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Determine the initial [SCN1] in beakers 1-6. Refer to the Data Table for Part I for all volumes used. Assume for now that these [SCN1] values are equal to the equilibrium [FeSCN2] in beakers 1-6 because of the large excess of Fe*³ used. Prepare a graph of Absorbance vs [FeSCN+2]. Remember that according to the Beer-Lambert Law, this graph should be a straight line. Scale your graph so that the [FeSCN2] can be estimated to the nearest 0.01 x 104 M and so that your absorbance values can be estimated to the nearest 0.001.
Transcribed Image Text:Determine the initial [SCN1] in beakers 1-6. Refer to the Data Table for Part I for all volumes used. Assume for now that these [SCN1] values are equal to the equilibrium [FeSCN2] in beakers 1-6 because of the large excess of Fe*³ used. Prepare a graph of Absorbance vs [FeSCN+2]. Remember that according to the Beer-Lambert Law, this graph should be a straight line. Scale your graph so that the [FeSCN2] can be estimated to the nearest 0.01 x 104 M and so that your absorbance values can be estimated to the nearest 0.001.
Beaker Volume of KSCN No solution 1 0.50 mL 9.50 mL Part I: Data for Calibration Graph Accurate Concentration of potassium thiocyanate, KSCN stock solution: 0.001 M 0.2 M Fe(NO3)3- Iron(III)nitrate solution: 0.5M Volume of HNO3 solution 0.2 M Volume of 0.2 M Fe(NO3)3 solution 10.00 mL Absorbance 0.037 2 1.00 mL 9.00 mL 10.00 mL 3 2.00 mL 8.00 mL 10.00 mL 4 3.00 mL 7.00 mL 10.00 mL 0.122 0.313 0.547 5 4.00 mL 6.00 mL 10.00 mL 6 5.00 mL 5.00 mL 10.00 mL 0.791 0.868
Transcribed Image Text:Beaker Volume of KSCN No solution 1 0.50 mL 9.50 mL Part I: Data for Calibration Graph Accurate Concentration of potassium thiocyanate, KSCN stock solution: 0.001 M 0.2 M Fe(NO3)3- Iron(III)nitrate solution: 0.5M Volume of HNO3 solution 0.2 M Volume of 0.2 M Fe(NO3)3 solution 10.00 mL Absorbance 0.037 2 1.00 mL 9.00 mL 10.00 mL 3 2.00 mL 8.00 mL 10.00 mL 4 3.00 mL 7.00 mL 10.00 mL 0.122 0.313 0.547 5 4.00 mL 6.00 mL 10.00 mL 6 5.00 mL 5.00 mL 10.00 mL 0.791 0.868
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