Use the Beer Lambert's Equation to solve for [FeSCN]: A = Elc From the above equation, C which is "x" in the ICE Chart = A/ (El) A is the Absorbance taken from the Spectrophotometric reading E is the extinction coefficient; and for this reaction, E = 4860 L/(mole-cm) l=1 cm (the diameter of the test tube vial is 1 cm) C= "x"= concentration in Molarity Test Tube # 1 2 3 4 [Fe] [Fe]f 0.1 M 0.1 M 0.1 M 0.1 M 1 2 3 4 Average Test Tube [FeJeq # [SCN-]i [SCN-]f 2.00E-3 M 2.00E-3 M 2.00E-3 M 2.00E-3 M Absorbance Table B-Calculated values for Reaction at Equilibrium (Use your ICE Chart for your Calculations. Refer to ICE Chart in Procedure) [SCN-Jeq "x" or [FeSCN Jeq 0.51 1.01 1.50 1.99 "x" [FeSCN2] Kc Note: In your report, use scientific notation for all calculated concentrations and for uniformity, have three significant figures All calculated values must be confirmed with calculations and shown in the report for Test Tubes 1-3