A) From the table you completed in Pre-lab question #1 from Exp. 25 in your lab manual,
Question:
A) From the table you completed in Pre-lab question #1 from Exp. 25 in your lab manual, what is the initial SCN- concentration for solution 1?
B) From the table you completed in Pre-lab question #1 from Exp. 25 in your lab manual, what is the initial SCN- concentration for solution 4?
C) From the table you completed in Pre-lab question #1 from Exp. 25 in your lab manual, what is the equilibrium Fe(SCN)2+ concentration for solution 5?
D) Imagine that you plotted the absorbance and Fe(SCN)2+ concentration data from the table you’ve completed in Pre-lab Question #1 of Exp. 25 in your lab manual. By plotting this absorbance versus concentration data you would have a standard curve. Then, you take an absorption spectrum of a solution which has an unknown Fe(SCN)2+equilibrium concentration. The absorbance of the solution is determined to be 0.840. Which of the following equilibrium concentrations of Fe(SCN)2+ most closelycorresponds to the solution for which the absorbance was measured?
E)An equilibrium solution is prepared by mixing 2.750 mL of 0.001650 M SCN-, 5.000 mL of 0.001650 M Fe3+, and 2.750 mL of 0.05000 M HNO3. The equilibrium solution’s absorbance is determined to be 0.9150. Using this absorbance value and a standard curve, you determine that the equilibrium concentration of Fe(SCN)2+ is 0.0001830 M. Prepare an ICE table for the equilibrium mixture. Include the initial concentrations, changes in concentrations, and the equilibrium concentrations of Fe3+, SCN- and Fe(SCN)2+. Using the information in your ICE table, calculate the equilibrium constant. What is the value of the equilibrium constant?