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4. A solution has 21.7% transmittance in a cell with a path length of 1.00 cm. If the material responsible for the absorption of light has a molar absorptivity e = 38.7 (L/mole-cm) at the wavelength used, calculate the concentration of this solution in mole/L. (Show all work.)

4. A solution has 21.7% transmittance in a cell with a path length of 1.00 cm. If the material responsible for the absorption of light has a molar absorptivity e = 38.7 (L/mole-cm) at the wavelength used, calculate the concentration of this solution in mole/L. (Show all work.)

Chemistry
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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i have also attached fig 7.2 for the second problem 

4. A solution has 21.7% transmittance in a cell with a path length of 1.00 cm. If the material responsible for the absorption of light has a molar absorptivity e = 38.7 (L/mole-cm) at the wavelength used, calculate the concentration of this solution in mole/L. (Show all work.)
Transcribed Image Text:4. A solution has 21.7% transmittance in a cell with a path length of 1.00 cm. If the material responsible for the absorption of light has a molar absorptivity e = 38.7 (L/mole-cm) at the wavelength used, calculate the concentration of this solution in mole/L. (Show all work.)
may be reproduced or transmitted without publisher's prior permission. 630-720 nm תח 400-420 red Spectrophotometry and Beer's Law violet Prelab deep blue orange light blue yellow yellow- green green 490-530 nm nm Name 530-545 Figure 7.2 Color wheel (Colors of light of various wavelengths Tme COF Light of different wavelengths is abso differing extents by a solution. A grap amount of light absorbed by a solution the absorption spectrum of the solu absorption spectrum for permangan: shown on the right. Again, the spect cates that light is strongly absorbee 520-550 nm, indicating that the c solution will be violet. (Absorption MTW R F 1. Write the mathematical expression for Beer's law and explain each symbol in the 2. Use Figure 7.2 to estimate the approximate wavelength of maximum absorption for an aque- ous solution of each of the following: permanganate in this region results tions of the electrons among the e the Mn(VII) ion; you will learn abo levels of the d-electrons in transitic later in the course.) daceholder.17883.er a. Hemoglobin (the molecule that gives blood its color) nm Beer's Law If a solution is colored, the intens b. Chlorophyll (the pigment that gives algae their color) is a measure of the concentration For example, by looking at the c nm coffee tell if the coffee i you can (that is, dilute or concentratee 3. Fill in the following for the correspondence between % transmittance and absorbance: ebergf6 is more concentrated. The mo by a solution, the higher the the solution. 100.0 % T %3D absorbance 1.00 absorbance = 50.0 % T = "% T absorbance The fraction of light absor depends on the following fa 0.50 absorbance %3D % T 420-450 nm 450-490 nm 545-580 7. o nm 580-630 nm
Transcribed Image Text:may be reproduced or transmitted without publisher's prior permission. 630-720 nm תח 400-420 red Spectrophotometry and Beer's Law violet Prelab deep blue orange light blue yellow yellow- green green 490-530 nm nm Name 530-545 Figure 7.2 Color wheel (Colors of light of various wavelengths Tme COF Light of different wavelengths is abso differing extents by a solution. A grap amount of light absorbed by a solution the absorption spectrum of the solu absorption spectrum for permangan: shown on the right. Again, the spect cates that light is strongly absorbee 520-550 nm, indicating that the c solution will be violet. (Absorption MTW R F 1. Write the mathematical expression for Beer's law and explain each symbol in the 2. Use Figure 7.2 to estimate the approximate wavelength of maximum absorption for an aque- ous solution of each of the following: permanganate in this region results tions of the electrons among the e the Mn(VII) ion; you will learn abo levels of the d-electrons in transitic later in the course.) daceholder.17883.er a. Hemoglobin (the molecule that gives blood its color) nm Beer's Law If a solution is colored, the intens b. Chlorophyll (the pigment that gives algae their color) is a measure of the concentration For example, by looking at the c nm coffee tell if the coffee i you can (that is, dilute or concentratee 3. Fill in the following for the correspondence between % transmittance and absorbance: ebergf6 is more concentrated. The mo by a solution, the higher the the solution. 100.0 % T %3D absorbance 1.00 absorbance = 50.0 % T = "% T absorbance The fraction of light absor depends on the following fa 0.50 absorbance %3D % T 420-450 nm 450-490 nm 545-580 7. o nm 580-630 nm
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