Chris wants to study an organometal complex that was synthesized as shown below.Cr3+ag+2salen) = Cr(salen),*(a4)He first prepared the working standards by adding specific volumes of Cr+ solution and added 5.00 ml of 0.500M salen and diluted the solutions to 32.0 ml. Theabsorbance of each standard was then measured at the Amax, 425 nm, using a UV-Vis spectrophotometer as shown in the table belowTable 1. Standardized solutions containing Cr(salen);".Concentration (M)Blank0.0100.0150.020Absorbance0.0210.2200.2950.3560.4210.4730.0250.030He then prepared an unknown solution by mixing 1.00-mL of 0.500 M Cr3+ with 2.00-mL of 0.500 M salen and diluting to 32.0 mL. The resulting mixture wasfound to have an absorbance of 0.285. A blank solution was run before analyzing the unknown and gave an absorbance of 0.015.А.Determine the best fit line (with r2) of the calibration curve.В.Calculate the equilibrium concentration (mM) of Cr3+ in the sample.C.Calculate the equilibrium concentration (mM) of salen in the sample.D.Determine the Keq of Cr(salen),3+E.What is the color of the complex?

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Chris wants to study an organometal complex that was synthesized as shown below. Cr3+ + 2salen = Cr(salen), He first prepared the working standards by adding specific volumes of Cr3+ solution and added 5.00 ml of 0.500M salen and diluted the solutions to 32.0 ml. Th absorbance of each standard was then measured at the Amax, 425 nm, using a UV-Vis spectrophotometer as shown in the table below Table 1. Standardized solutions containing Cr(salen):". Concentration (M) Blank 0.010 0.015 0.020 0.025 0.030 Absorbance 0.021 0.220 0.295 0.356 0.421 0.473 He then prepared an unknown solution by mixing 1.00-mL of 0.500 M Cr3+ with 2.00-mL of 0.500 M salen and diluting to 32.0 mL. The resulting mixture was found to have an absorbance of 0.285. A blank solution was run before analyzing the unknown and gave an absorbance of 0.015. А. Determine the best fit line (with r2) of the calibration curve. В. Calculate the equilibrium concentration (mM) of Cr3+ in the sample. C. Calculate the equilibrium concentration (mM) of salen in the sample.

Chris wants to study an organometal complex that was synthesized as shown below. Cr3+ + 2salen = Cr(salen), He first prepared the working standards by adding specific volumes of Cr3+ solution and added 5.00 ml of 0.500M salen and diluted the solutions to 32.0 ml. Th absorbance of each standard was then measured at the Amax, 425 nm, using a UV-Vis spectrophotometer as shown in the table below Table 1. Standardized solutions containing Cr(salen):". Concentration (M) Blank 0.010 0.015 0.020 0.025 0.030 Absorbance 0.021 0.220 0.295 0.356 0.421 0.473 He then prepared an unknown solution by mixing 1.00-mL of 0.500 M Cr3+ with 2.00-mL of 0.500 M salen and diluting to 32.0 mL. The resulting mixture was found to have an absorbance of 0.285. A blank solution was run before analyzing the unknown and gave an absorbance of 0.015. А. Determine the best fit line (with r2) of the calibration curve. В. Calculate the equilibrium concentration (mM) of Cr3+ in the sample. C. Calculate the equilibrium concentration (mM) of salen in the sample.

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter14: Applications Of Ultraviolet-visible Molecular Absorption Spectrometry

Section: Chapter Questions

Problem 14.19QAP

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