The standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate solutions of known concentration. You are asked to analyze a Fe(SCN)²⁺ solution with an unknown concentration and an absorbance value of 0.179. The slope-intercept form of the equation of the line is \( y = 4536.6x + 0.0392 \). The unknown was analyzed on the same instrument as the standard curve solutions at the same temperature.**What is the Fe³⁺ concentration of the unknown solution?**\[ \text{[Fe}^{3+}\text{]} = \]**mol/L****Graph Explanation:**The graph provided is titled "Iron(III) thiocyanate standard curve." It is a linear plot with absorbance on the y-axis and Fe³⁺ concentration in molarity (M) on the x-axis. The data points form a straight line that increases linearly, indicating a direct proportional relationship between absorbance and concentration. The line begins near the origin and rises steadily, illustrating the use of Beer’s Law.

Given that: Absorbance = 0.179 Slope-intercept equation = y=4536.6x + 0.0392 Concentration of Fe3+ =…

tion 13 of 24 > The standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate solutions of known concentration. You are asked to analyze a Fe(SCN)2+ solution with an unknown concentration and an absorbance value of 0.179. The slope-intercept form of the equation of the line is y = 4536.6x + 0.0392. The unknown was analyzed on the same instrument as the standard curve solutions at the same temperature. What is the Fe3+ concentration of the unknown solution? Iron(III) thiocynate standard curve 1.0 mol/L [Fe**] = 0.5 - 0.0001 0.0002 Fet concentration (M) Absorbance

tion 13 of 24 > The standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate solutions of known concentration. You are asked to analyze a Fe(SCN)2+ solution with an unknown concentration and an absorbance value of 0.179. The slope-intercept form of the equation of the line is y = 4536.6x + 0.0392. The unknown was analyzed on the same instrument as the standard curve solutions at the same temperature. What is the Fe3+ concentration of the unknown solution? Iron(III) thiocynate standard curve 1.0 mol/L [Fe**] = 0.5 - 0.0001 0.0002 Fet concentration (M) Absorbance

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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