Can you help me answering the last 3 rows which is the Equilibrium [FeSCN2+] (M ), Equilibrium constant Kc and Average Kc. K EQUILIBRIUM · EQUILIBRIUM CONSTANT (SPECTROPHOTOMETRY)SUBMITINTRODUCTIONLABORATORY SIMULATIONPHASE 9:Lab Data- XDetermine concentration ofFESCN2+Diluted solutionsComplete the following steps. Place allWavelength:used glassware in Wash/Waste bin.Solution 1Solution 2Solution 3447 nmUse clean Pasteur pipet totransfer the following solutionsVolume stock solution (mL)4.004.004.00ENTER WAVELENGTHVolume DI water (mL)1.002.003.00into separate 1-cm cuvettesConcentration iron(III) thiocyanate ion[FeSCN2*] (M)• solution 1• solution 20.0002400.0002000.000171Absorbance:0.165solution 3solution 4Calibration curve• solution 5MEASURE SAMPLEConcentration iron(III) thiocyanate ion[FeSCN2+] (M)SolutionAbsorbanceUse wipes to clean cuvettesCALIBRATEDStock0.0003000.3813Measure and record theSolution 10.0002400.305absorbance for each sample inLab DataSolution 20.0002000.254"會會會會• Place cuvette containing12 3 45Solution 30.0001710.217solution intospectrophotometer• Select Measure SampleBELSMolar absorptivity (M^cm-1)1270GO TO PHASE 10Prepared solutions, absorbance, and calculated [FESCN2*]PHASES EQUILIBRIUM · EQUILIBRIUM CONSTANT (SPECTROPHOTOMETRY)SUBMITINTRODUCTIONLABORATORY SIMULATIONPHASE 9:A Lab Data- XDetermine concentration ofFESCN2+Prepared solutions, absorbance, and calculated [FESCN<"]Verify your equilibrium concentration calculation.Did you report your data to the correct number of significant figures?Complete the following steps. Place allWavelength:used glassware in Wash/Waste bin.concentration iron(I) nitrate0.00400447 nm0.004000.004000.004000.00400[Fe(NO3)3] (M)Use wipes to clean cuvettesConcentration potassium thiocyanate[KSCN] (M)ENTER WAVELENGTH0.004000.004000.004000.004000.00400Measure and record theabsorbance for each sample inLab DataVolume Fe(NO3)3 (mL)5.005.005.005.005.00Absorbance:Volume KSCN (mL)5.000.1654.003.002.001.00• Place cuvette containingsolution intoVolume DI water (mL)0.001.002.003.004.00MEASURE SAMPLEspectrophotometer• Select Measure Sample• Remove cuvette fromInitial concentration [Fe3+] (M).00200.00200.00200.00200.00200Initial concentration [SCN'] (M).00200.00160.00120.000800.000400CALIBRATEDspectrophotometer andplace in cuvette rackAbsorbance0.7840.5870.4740.3690.165Equilibrium (FesCN2*] (M)Calculate iron(III) thiocyanatecomplex ion concentration (inEquilibrium constant K.M) for each solution. Record inLab DataAverage K.BELSGO TO PHASE 10How to calculate iron(IIl) thiocyanate complex ion concentration for stock solutionPHASES11

Balanced Chemical Reaction is as follows : Fe +3. + SCN- ----> FeSCN2+

concentration iron(II) nitrate 0.00400 0.00400 0.00400 0.00400 0.00400 (Fe(NO3)3l (M) Concentration potassium thiocyanate [KSCN] (M) 0.00400 0.00400 0.00400 0.00400 0.00400 Volume Fe(NO3)3 (mL) 5.00 5.00 5.00 5.00 5.00 Volume KSCN (mL) 5.00 4.00 3.00 2.00 1.00 Volume DI water (mL) 0.00 1.00 2.00 3.00 4.00 Initial concentration [Fe3*] (M) .00200 .00200 .00200 .00200 .00200 Initial concentration [SCN'] (M) .00200 .00160 .00120 .000800 .000400 Absorbance 0.784 0.587 0.474 0.369 0.165 Equilibrium [FESCN²ª] (M) Equilibrium constant K. Average K.

concentration iron(II) nitrate 0.00400 0.00400 0.00400 0.00400 0.00400 (Fe(NO3)3l (M) Concentration potassium thiocyanate [KSCN] (M) 0.00400 0.00400 0.00400 0.00400 0.00400 Volume Fe(NO3)3 (mL) 5.00 5.00 5.00 5.00 5.00 Volume KSCN (mL) 5.00 4.00 3.00 2.00 1.00 Volume DI water (mL) 0.00 1.00 2.00 3.00 4.00 Initial concentration [Fe3*] (M) .00200 .00200 .00200 .00200 .00200 Initial concentration [SCN'] (M) .00200 .00160 .00120 .000800 .000400 Absorbance 0.784 0.587 0.474 0.369 0.165 Equilibrium [FESCN²ª] (M) Equilibrium constant K. Average K.

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 14.8QAP

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