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The standard solutions of iron(III) thiocyanate (solutions of known concentration) were prepared for you by mixing the solutions as shown in Table 1. a. Because of the very high concentration of KSCN used in each test tube, you can assume essentially all of the Fe(NO3)3 that has been added has reacted to form FeSCN2+ (by Equation 2, in the Background). Calculate the molar concentration of Fe(NO3)3 in each standard after it is diluted with the other solutions, which equals the concentration of FeSCN2+ formed in each sample (show your work for at least one of these calculations). These are the concentrations that were used in the standard curve.   I have the table and the equation 2 on the top attached

The standard solutions of iron(III) thiocyanate (solutions of known concentration) were prepared for you by mixing the solutions as shown in Table 1. a. Because of the very high concentration of KSCN used in each test tube, you can assume essentially all of the Fe(NO3)3 that has been added has reacted to form FeSCN2+ (by Equation 2, in the Background). Calculate the molar concentration of Fe(NO3)3 in each standard after it is diluted with the other solutions, which equals the concentration of FeSCN2+ formed in each sample (show your work for at least one of these calculations). These are the concentrations that were used in the standard curve.   I have the table and the equation 2 on the top attached

Chemistry
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1. The standard solutions of iron(III) thiocyanate (solutions of known concentration) were prepared for you by mixing the solutions as shown in Table 1.

a. Because of the very high concentration of KSCN used in each test tube, you can assume essentially all of the Fe(NO3)3 that has been added has reacted to form FeSCN2+ (by Equation 2, in the Background). Calculate the molar concentration of Fe(NO3)3 in each standard after it is diluted with the other solutions, which equals the concentration of FeSCN2+ formed in each sample (show your work for at least one of these calculations).
These are the concentrations that were used in the standard curve.

 

I have the table and the equation 2 on the top attached 

Equation 2 Fe*(aq) + SCN'(aq) FESCN*"(aq) Studies of iron(I) thiocyanate 1. Standard solutions of iron(III) thiocyanate have been prepared in the screw-cap vials that are used for the spectrophotometers you used earlier this semester. They were made by mixing aqueous solutions of Fe(NO3)3 (1.0 × 10“ M), KSCN (1.0 M), and HNO3 (0.10 M) as shown in Table 1 in clean, dry vials. Note that the Fe(NO3); stock solution prepared was dissolved in 0.10 M HNO; so that all of your solutions have the same concentration of nitric acid. Table 1 Standard ID Vol. 1.0 x 10“ M Vol. 1.0 M KSCN Vol. 0.10 M ΗΝΟ Fe(NO;)3 A 1.0 mL 5.0 ml 4.0 ml 2.0 ml 5.0 mL 3.0 mL 3.0 ml 5.0 ml 2.0 ml D 4.0 mL 5.0 ml 1.0 mL E 5.0 mL 5.0 mL O0 mL
Transcribed Image Text:Equation 2 Fe*(aq) + SCN'(aq) FESCN*"(aq) Studies of iron(I) thiocyanate 1. Standard solutions of iron(III) thiocyanate have been prepared in the screw-cap vials that are used for the spectrophotometers you used earlier this semester. They were made by mixing aqueous solutions of Fe(NO3)3 (1.0 × 10“ M), KSCN (1.0 M), and HNO3 (0.10 M) as shown in Table 1 in clean, dry vials. Note that the Fe(NO3); stock solution prepared was dissolved in 0.10 M HNO; so that all of your solutions have the same concentration of nitric acid. Table 1 Standard ID Vol. 1.0 x 10“ M Vol. 1.0 M KSCN Vol. 0.10 M ΗΝΟ Fe(NO;)3 A 1.0 mL 5.0 ml 4.0 ml 2.0 ml 5.0 mL 3.0 mL 3.0 ml 5.0 ml 2.0 ml D 4.0 mL 5.0 ml 1.0 mL E 5.0 mL 5.0 mL O0 mL
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