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Chemistry
Chemistry
10th Edition
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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For each measured sample from Table 2, use the ICE table method to determine the molar equilibrium concentration of Fe3+, SCN-, and FeSCN2+. (For this one, if you can do just one example that would be great, you don't have to do all of them!)

y = 1.747x10ª x + 4.384x10-2 R2 = 0.9921 Sample # Absorbance 4 0.333857 7 0.390088 10 0.741806
Transcribed Image Text:y = 1.747x10ª x + 4.384x10-2 R2 = 0.9921 Sample # Absorbance 4 0.333857 7 0.390088 10 0.741806
4. To determine the equilibrium constant (K.) of the reaction, you will need solutions containing Fe(NO3)3 and KSCN of known initial concentrations. Three solutions in Table 2 were prepared in clean, dry vials for the video (note that the Fe(NO:)3 and KSCN are also dissolved in solutions of 0.10 M HNO3, so the concentration of nitric acid is the same in all solutions). Other solutions in Table 2 were prepared by students in previous semesters and measured for class-data analysis. 5. These samples were read as unknowns in the spectrophotometer. Record the absorbance at Amax for each of these samples. Table 2 Sample Number Vol. 0.0025 M Vol. 0.0025 M KSSCN Vol. 0.10 M HNO, Fe(NO,)3 1 1.0 ml 1.0 ml 5.0 mL 1.0 mL 1.5 ml 4.5 mL 1.0 ml 2.0 ml 4.0 mL 4 1.0 ml 2,5 mL 3.5 mL 1.0 ml 3.0 ml 3.0 ml 2.0 mL 1.0 ml 4.0 mL 7 2.0 ml 1.5 mL 3.5 mL 8. 2.0 ml 2.0 ml 3.0 ml 2.0 mL 2,5 ml 2.5 ml 10 2.0 ml 3.0 ml 2.0 ml
Transcribed Image Text:4. To determine the equilibrium constant (K.) of the reaction, you will need solutions containing Fe(NO3)3 and KSCN of known initial concentrations. Three solutions in Table 2 were prepared in clean, dry vials for the video (note that the Fe(NO:)3 and KSCN are also dissolved in solutions of 0.10 M HNO3, so the concentration of nitric acid is the same in all solutions). Other solutions in Table 2 were prepared by students in previous semesters and measured for class-data analysis. 5. These samples were read as unknowns in the spectrophotometer. Record the absorbance at Amax for each of these samples. Table 2 Sample Number Vol. 0.0025 M Vol. 0.0025 M KSSCN Vol. 0.10 M HNO, Fe(NO,)3 1 1.0 ml 1.0 ml 5.0 mL 1.0 mL 1.5 ml 4.5 mL 1.0 ml 2.0 ml 4.0 mL 4 1.0 ml 2,5 mL 3.5 mL 1.0 ml 3.0 ml 3.0 ml 2.0 mL 1.0 ml 4.0 mL 7 2.0 ml 1.5 mL 3.5 mL 8. 2.0 ml 2.0 ml 3.0 ml 2.0 mL 2,5 ml 2.5 ml 10 2.0 ml 3.0 ml 2.0 ml
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