Questions 2-4 refer to the absorption spectrum for a 0.80 M solution of metal M2+ and a calibration curve for the metal M2 collected in a 1.5 cm cuvette, shown in Figures 2 and 3. 0.9 1.4 0.8 1.2 0.7 1 0.6 0.8 0.5 0.4 0.6 0.3 0.4 0.2 0.2 0.1 1.2 0 1 0.8 0.6 600 550 650 0.4 450 500 700 400 0.2 0 [M2+] (M) Wavelength (nm) Figure 2. Absorption spectrum of 0.80 M M2+ Figure 3. Calibration curve for M2+ 2. At what wavelength was the calibration curve obtained? Use the data from both graphs to explain your choice. 3. Would the value of the molar absorptivity (a) be greater, lesser or equal for M for the absorbance of light at 400. nm vs. 650. nm. Use the data from Figure 2 to explain your choice. 4. Using the calibration curve in Figure 3: A sample of a solution of unknown concentration of M2 has an absorbance reading that is "off scale" because the absorbance was measured to be above 0.8. You dilute this sample by adding 5.0 mL of water to 1.0 mL of the solution of M2*. The absorbance of the diluted solution was determined to be 0.35 at the same wavelength used for the calibration curve. What is the concentration of M2, in M, of the original undiluted sample? Absorbance Absorbance
Questions 2-4 refer to the absorption spectrum for a 0.80 M solution of metal M2+ and a calibration curve for the metal M2 collected in a 1.5 cm cuvette, shown in Figures 2 and 3. 0.9 1.4 0.8 1.2 0.7 1 0.6 0.8 0.5 0.4 0.6 0.3 0.4 0.2 0.2 0.1 1.2 0 1 0.8 0.6 600 550 650 0.4 450 500 700 400 0.2 0 [M2+] (M) Wavelength (nm) Figure 2. Absorption spectrum of 0.80 M M2+ Figure 3. Calibration curve for M2+ 2. At what wavelength was the calibration curve obtained? Use the data from both graphs to explain your choice. 3. Would the value of the molar absorptivity (a) be greater, lesser or equal for M for the absorbance of light at 400. nm vs. 650. nm. Use the data from Figure 2 to explain your choice. 4. Using the calibration curve in Figure 3: A sample of a solution of unknown concentration of M2 has an absorbance reading that is "off scale" because the absorbance was measured to be above 0.8. You dilute this sample by adding 5.0 mL of water to 1.0 mL of the solution of M2*. The absorbance of the diluted solution was determined to be 0.35 at the same wavelength used for the calibration curve. What is the concentration of M2, in M, of the original undiluted sample? Absorbance 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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Please answer question 2 and show all work.
![Questions 2-4 refer to the absorption spectrum for a 0.80 M solution of metal M2+ and a
calibration curve for the metal M2 collected in a 1.5 cm cuvette, shown in Figures 2
and 3.
0.9
1.4
0.8
1.2
0.7
1
0.6
0.8
0.5
0.4
0.6
0.3
0.4
0.2
0.2
0.1
1.2
0
1
0.8
0.6
600
550
650
0.4
450
500
700
400
0.2
0
[M2+] (M)
Wavelength (nm)
Figure 2. Absorption spectrum of 0.80 M M2+
Figure 3. Calibration curve for M2+
2. At what wavelength was the calibration curve obtained? Use the data from both
graphs to explain your choice.
3. Would the value of the molar absorptivity (a) be greater, lesser or equal for M for the
absorbance of light at 400. nm vs. 650. nm. Use the data from Figure 2 to explain
your choice.
4. Using the calibration curve in Figure 3: A sample of a solution of unknown
concentration of M2 has an absorbance reading that is "off scale" because the
absorbance was measured to be above 0.8. You dilute this sample by adding 5.0 mL
of water to 1.0 mL of the solution of M2*. The absorbance of the diluted solution was
determined to be 0.35 at the same wavelength used for the calibration curve. What is
the concentration of M2, in M, of the original undiluted sample?
Absorbance
Absorbance](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F16cc15fb-81a0-46e3-96f0-13be73eaad53%2F31fa4118-b825-4594-9a45-847da0509f0e%2Frsqjvqd.jpeg&w=3840&q=75)
Transcribed Image Text:Questions 2-4 refer to the absorption spectrum for a 0.80 M solution of metal M2+ and a
calibration curve for the metal M2 collected in a 1.5 cm cuvette, shown in Figures 2
and 3.
0.9
1.4
0.8
1.2
0.7
1
0.6
0.8
0.5
0.4
0.6
0.3
0.4
0.2
0.2
0.1
1.2
0
1
0.8
0.6
600
550
650
0.4
450
500
700
400
0.2
0
[M2+] (M)
Wavelength (nm)
Figure 2. Absorption spectrum of 0.80 M M2+
Figure 3. Calibration curve for M2+
2. At what wavelength was the calibration curve obtained? Use the data from both
graphs to explain your choice.
3. Would the value of the molar absorptivity (a) be greater, lesser or equal for M for the
absorbance of light at 400. nm vs. 650. nm. Use the data from Figure 2 to explain
your choice.
4. Using the calibration curve in Figure 3: A sample of a solution of unknown
concentration of M2 has an absorbance reading that is "off scale" because the
absorbance was measured to be above 0.8. You dilute this sample by adding 5.0 mL
of water to 1.0 mL of the solution of M2*. The absorbance of the diluted solution was
determined to be 0.35 at the same wavelength used for the calibration curve. What is
the concentration of M2, in M, of the original undiluted sample?
Absorbance
Absorbance
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