Absorbance56Part A: Determination of a Calibration CurveStnd:[Fe(SCN)2+]Absorbance1.000000'000 0 00.4032.060000'00.0001060.5133.0.0001270.5770.000189996'00.0002041.037Calibration Curvey 5146x - 0.0315R2 = 0.99350.2000.0000500.0001000.0001500.0002000.000250-0.200to 00000[Fe(SCN)2+]Absorbance Data Needed to Fill Row 3, Part 2ExperimentOptical Absorbance[Fe(SCN)2+]0.2871.0.537661.0031.217Original[SCN-[Fe(SCN)2+] (Final)[0.00033Original [Fe3+]0.001650.00006 139.7624040.001650.000113 134.40556599000'00.001650.0001683 138.23262366000'00.001650.001320.0002173 137.5457230.001650.001650.000255 131.036343 Name:Date:Section:Data Report Sheet: Spectrophotometric Determination of an EquilibriumConstant.Part A: Determination of a Calibration Curve:Stnd.1Std. 2Stnd. 3Stnd 4Stnd. 5Stnd. 6(CH)[Fe(SCN)*]Column AAbsorbanceColumn EEquation of Calibration Line:Correlation Coefficient:Slope (bɛ):Part B: Determination of KExpt. 1Expt. 2Expt. 3Expt. 4Expt. 5(Fe"linitial(Table 1)[SCNJinitial(Table 1)[Fe(SCN)**]eqi.TịnbəColumn F[Fe"lequil.([Fe"Imital -[Fe(SCN)**I«qull.)[SCNleguil[SCN'],(ISCN']initial "[Fe(SCN)*"lequil.KAverage K:

A method to determine the concentration of the unknown solution is called a calibration/standard…

Absorbance 1.200 1.000 0.800 0.600 0.400 0.200 0.000 Stnd: 1 -0.200 22256 0.000000 0.000050 Original [Fe3+] 0.00165 0.00165 0.00165 [Fe(SCN)2+] 0.00165 0.00165 0.000000 0.000090 0.000106 0.000127 0.000189 0.000204 Calibration Curve y=5146x -0.0315 R² = 0.9935 0.000100 Absorbance Data Needed to Fill Row 3, Part 2 Experiment 1 2 3 4 [Fe(SCN)2+] 5 Original [SCN- ] Absorbance 0.000150 0.00033 0.00066 0.00099 0.00132 0.00165 0.000 0.403 0.513 0.577 0.966 1.037 0.000200 Optical Absorbance [Fe(SCN)2+] 0.287 0.537 0.799 1.003 1.217 [Fe(SCN)2+] (Final) 0.000250 K 0.00006 139.762404 0.000113 134.405565 0.0001683 138.232623 0.0002173 137.545723 0.000255 131.036343

Absorbance 1.200 1.000 0.800 0.600 0.400 0.200 0.000 Stnd: 1 -0.200 22256 0.000000 0.000050 Original [Fe3+] 0.00165 0.00165 0.00165 [Fe(SCN)2+] 0.00165 0.00165 0.000000 0.000090 0.000106 0.000127 0.000189 0.000204 Calibration Curve y=5146x -0.0315 R² = 0.9935 0.000100 Absorbance Data Needed to Fill Row 3, Part 2 Experiment 1 2 3 4 [Fe(SCN)2+] 5 Original [SCN- ] Absorbance 0.000150 0.00033 0.00066 0.00099 0.00132 0.00165 0.000 0.403 0.513 0.577 0.966 1.037 0.000200 Optical Absorbance [Fe(SCN)2+] 0.287 0.537 0.799 1.003 1.217 [Fe(SCN)2+] (Final) 0.000250 K 0.00006 139.762404 0.000113 134.405565 0.0001683 138.232623 0.0002173 137.545723 0.000255 131.036343

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter21: Rates Of Chemical Reactions, Ii. A Clock Reaction

Section: Chapter Questions

Problem 2ASA

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Complete chart for Part B: Determination of K
Is Part B: Determination of K is correct result?
(ISCN Data Report Sheet: Spectrophotometric Determination of an Equilibrium Constant. Part A: Determination of a Calibration Curve; Stnd.1 Std. 2 Stnd. 3 Stnd 4 Sind. 5 Stad. 6 (Но) 0.000090 0.000106 0.000127 0.000189 0.000204 (Fe(SCN)"] Column A 0.432 0.480 0.633 0.831 0.887 Absorbance Column E 0. y= 4339.8x + 0.0258 Equafion of Calibration Line: 0.9904 Correlation Coefficient; 4339.8 Slope (br): Part B: Determination of K Expt. 1 Еxpt, 2 Expt. 3 Expt. 4 Expt. 5 0,00165 0.00165 0.00165 0.00165 000165 (Table 1) 0.00033 0.00066 0.00099 0.001 0.00165 ISCN at (Table 1) 0.290 0.524 0.803 1.024 1.199 [Fe(SCN)*l Column F |Fe"leqt 148.6799 135.1678 142.2659 141 8466 134.2843 Average K:140 448 I
FILL IN THE BLANKS.
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