As your undergraduate thesis, you developed a colorimetric method for determining a certain metal (M) found in your local water supply. You achieved this by reacting the metal with an organic ligand that produced a colored complex that strongly absorbs the wavelength at 478 nm. The following results were obtained for standard solutions of nitrite and for a sample containing an unknown amount: mg/L metal Absorbance 0.000 0.000 0.100 0.052 0.200 0.110 0.400 0.214 0.500 0.281 1.000 0.556 1.500 0.816 2.000 1.078 Sample 0.114 d. Assuming the path length of your beam is 1.00 cm, which is the common size for a cuvette, what is the absorptivity of your solution? e. What is the concentration (mg/L) of the metal in your sample? Show your calculation, follow format.
As your undergraduate thesis, you developed a colorimetric method for determining a certain metal (M) found in your local water supply. You achieved this by reacting the metal with an organic ligand that produced a colored complex that strongly absorbs the wavelength at 478 nm. The following results were obtained for standard solutions of nitrite and for a sample containing an unknown amount: mg/L metal Absorbance 0.000 0.000 0.100 0.052 0.200 0.110 0.400 0.214 0.500 0.281 1.000 0.556 1.500 0.816 2.000 1.078 Sample 0.114 d. Assuming the path length of your beam is 1.00 cm, which is the common size for a cuvette, what is the absorptivity of your solution? e. What is the concentration (mg/L) of the metal in your sample? Show your calculation, follow format.
Chapter24: Introduction To Spectrochemical Methods
Section: Chapter Questions
Problem 24.21QAP
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Question
![As your undergraduate thesis, you developed a colorimetric method for determining a certain metal
(M) found in your local water supply. You achieved this by reacting the metal with an organic ligand
that produced a colored complex that strongly absorbs the wavelength at 478 nm. The following
results were obtained for standard solutions of nitrite and for a sample containing an unknown
amount:
mg/L metal
Absorbance
0.000
0.000
0.100
0.052
0.200
0.110
0.400
0.214
0.500
0.281
1.000
0.556
1.500
0.816
2.000
1.078
Sample
0.114
d. Assuming the path length of your beam is 1.00 cm, which is the common size for a cuvette,
what is the absorptivity of your solution?
e. What is the concentration (mg/L) of the metal in your sample? Show your calculation, follow
format.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdcaf39dd-a595-4c17-9250-800caab6f188%2F747435cd-847e-44b4-8190-c927e97abbdb%2Ffdhkd5w_processed.jpeg&w=3840&q=75)
Transcribed Image Text:As your undergraduate thesis, you developed a colorimetric method for determining a certain metal
(M) found in your local water supply. You achieved this by reacting the metal with an organic ligand
that produced a colored complex that strongly absorbs the wavelength at 478 nm. The following
results were obtained for standard solutions of nitrite and for a sample containing an unknown
amount:
mg/L metal
Absorbance
0.000
0.000
0.100
0.052
0.200
0.110
0.400
0.214
0.500
0.281
1.000
0.556
1.500
0.816
2.000
1.078
Sample
0.114
d. Assuming the path length of your beam is 1.00 cm, which is the common size for a cuvette,
what is the absorptivity of your solution?
e. What is the concentration (mg/L) of the metal in your sample? Show your calculation, follow
format.
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