Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 μL of a 1000.0 μg/mL Cd standard was added to 10.0 mL of the unknown solution. The results obtained are shown in the table.
| Absorbance | |
|---|---|
| Reagent blank | 0.024 |
| Sample | 0.395 |
| Sample plus addition | 0.859 |
What is the concentration of the cadmium in the waste stream sample?
c=
μg/mL
Later, the analyst learned that the blank was not truly a reagent blank, but water. The absorbance of the actual reagent blank, is 0.060. Calculate the cadmium concentration using the new information for the blank.
c=
μg/mL
Calculate the percent error caused by using water as the blank instead of the reagent blank.
error:
%
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Atomic absorption spectroscopy was used with the method of
standard additions to determine the concentration of...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.010.0 μL of a 1000.0 μg/mL CdCd standard was added to 10.0 mL of the unknown solution. The results obtained are shown in the table. Reagent blank 0.023 Sample 0.342 Sample plus addition 0.749 What is the concentration of the cadmium in the waste stream sample? Later, the analyst learned that the...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 L of a 1000.0 ug/mL Cd standard was added to 10.0 mL of solution. The following data were obtained Absorbance of reagent blank 0.042 Absorbance of sample 0.377 Absorbance of sample plus addition 0.762 What was the concentration of the cadmium in the waste stream sample? Number 0.4 ug mL Later,...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 L of a 1000.0 mL Cd standard was added to 10.0 mL of solution. The following data were obtained: sorbance of reagent blank- 0.029 Absorbance of sample 0.464 Absorbance of sample plus addition 0.863 What was the concentration of the cadmium in the waste stream sample? Number 1.09x 10 ug/mL Later,...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 μL of a 1000.0 μg/mL Cd standard was added to 10.0 mL of the unknown solution. The results obtained are shown in the table. Absorbance Reagent blank 0.023 Sample 0.498 Sample plus addition 0.714 What is the concentration of the cadmium in the waste stream sample?
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2. An analyst is measuring cadmium in drinking water using Atomic Absorption Spectroscopy. The analyst prepares...
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The method of standard additions was used to determine nitrite in a soil sample. A 1.00-ml portion of the sample was mi...
The method of standard additions was used to determine nitrite in a soil sample. A 1.00-ml portion of the sample was mixed with 22.00 mL of a colorimetric reagent, and the nitrite was converted to a colored product that produced a blank-corrected absorbance of 0.300. To 51.00 mL of the original sample, 1.00 mL of a standard solution of 1.00×10 M nitrite was added. The same color-forming procedure was followed, and the new absorbance was 0.480. What was the concentration...
The correct answer is 7.14x10^-4, but I am not sure how to calculate it. The method of standard additions was used to de...
The correct answer is 7.14x10^-4, but I am not sure how to
calculate it.
The method of standard additions was used to determine nitrite in a soil sample. A 1.00-mL portion of the sample was mixed with 22.00 mL of a colorimetric reagent, and the nitrite was converted to a colored product that produced a blank-corrected absorbance of 0.300. To 51.00 mL of the original sample, 1.00 mL of a standard solution of 1.00x10 M nitrite was added. The same...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 L of a 1000.0 ug/mL Cd standard was added to 10.0 mL of solution. The following data were obtained Absorbance of reagent blank 0.042 Absorbance of sample 0.377 Absorbance of sample plus addition 0.762 What was the concentration of the cadmium in the waste stream sample? Number 0.4 ug mL Later,...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 L of a 1000.0 mL Cd standard was added to 10.0 mL of solution. The following data were obtained: sorbance of reagent blank- 0.029 Absorbance of sample 0.464 Absorbance of sample plus addition 0.863 What was the concentration of the cadmium in the waste stream sample? Number 1.09x 10 ug/mL Later,...
The method of standard additions was used to determine nitrite in a soil sample. A 1.00-ml portion of the sample was mixed with 22.00 mL of a colorimetric reagent, and the nitrite was converted to a colored product that produced a blank-corrected absorbance of 0.300. To 51.00 mL of the original sample, 1.00 mL of a standard solution of 1.00×10 M nitrite was added. The same color-forming procedure was followed, and the new absorbance was 0.480. What was the concentration...
Atomic emission spectroscopy and the method of standard addition are used to determine the Nat concentration and its uncertainty in an unknown sample. Increasing amounts of a 1.75 μg/m standard Na+ solution are added to a series of volumetric flasks containing 15.00 mL of the unknown 200.0 mL. Atomic emission spectroscopy is then used to measure the emission intensity of each solution. solution. The volumetric flasks are then diluted to a final volume of Unknown volume Standard volume Final volume...
2. An analyst is measuring cadmium in drinking water using Atomic Absorption Spectroscopy. The analyst prepares a set of calibration standards between 1 ppb and 50 ppb. The calibration curve is linear between these concentrations and the linear least squares equation is y=0.0127x + 0.0710. The analyst then runs a set of 4 drinking water samples. a) [What kind of standardization was used for this calibration curve: standard addition, internal standard, or external standard?] b) For sample 1, the analyst...
The method of standard additions was used to determine nitrite in a soil sample. A 1.00-ml portion of the sample was mixed with 22.00 mL of a colorimetric reagent, and the nitrite was converted to a colored product that produced a blank-corrected absorbance of 0.300. To 51.00 mL of the original sample, 1.00 mL of a standard solution of 1.00×10 M nitrite was added. The same color-forming procedure was followed, and the new absorbance was 0.480. What was the concentration...
The correct answer is 7.14x10^-4, but I am not sure how to
calculate it.
The method of standard additions was used to determine nitrite in a soil sample. A 1.00-mL portion of the sample was mixed with 22.00 mL of a colorimetric reagent, and the nitrite was converted to a colored product that produced a blank-corrected absorbance of 0.300. To 51.00 mL of the original sample, 1.00 mL of a standard solution of 1.00x10 M nitrite was added. The same...
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