Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol are = 36400 and =...
Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol are = 36400 and = 5520 at 510 nm and = 1240 and = 17500 at 656 nm. A 0.389-g sample was dissolved and diluted to 50.0 mL. A 25.0-mL aliquot was treated to eliminate interferences; after addition of 2,3-quinoxalinedithiol, the volume was adjusted to 50.0 mL. This solution had an absorbance of 0.487 at 510 nm and 0.268 at 656 nm in a 1.00-cm cell. Calculate the concentration in parts per million of cobalt and nickel in the sample.
What is the concentration of cobalt in ppm?
What is the concentration of nickel in ppm?
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Molar absorptivity data for the cobalt and nickel complexes with
2,3-quinoxalinedithiol are = 36400 and =...
Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol are = 364...
Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol are = 36400 and = 5520 at 510 nm and = 1240 and = 17500 at 656 nm. A 0.389-g sample was dissolved and diluted to 50.0 mL. A 25.0-mL aliquot was treated to eliminate interferences; after addition of 2,3-quinoxalinedithiol, the volume was adjusted to 50.0 mL. This solution had an absorbance of 0.487 at 510 nm and 0.268 at 656 nm in a 1.00-cm cell. Calculate the concentration...
Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol are εco=36,400 and εNi=5520 at...
Molar absorptivity data for the cobalt and nickel complexes with 2,3-quinoxalinedithiol are εco=36,400 and εNi=5520 at 510 nm and εco=1240 and εNi=17,500 at 656 nm. A 0.519 g sample was dissolved and diluted to 50.0 mL. A 25.00 mL aliquot was treated to eliminate interferences; after addition of 2,3-quinoxalinedithiol, the volume was adjusted to 50.0 mL. The solution has absorbances of 0.477 at 510 nm and 0.219 at 656 nm in a 1-cm cell. Calculate the concentration in parts per...
Spectrochemical Analysis Methods
Given the molar absorptivity data for cobalt complex with 2,3-quinoxalinedithiol (QT) and QDT at 510 nm are:eCo = 36400 and egoT = 250 (at 510 nm)A 0.515 g sample was dissolved and diluted to 50.0 mL. A 20.0 mL aliquot was treated and QDT was added (with an excess QDT of 1x 10-4 M). The final volume was then adjusted to 50.0 mL. Thissolution has an absorbance of 0.371 at 510 nm in a 1.0 cm cell.Determine (a) the molar...
Ligand X forms a complex with both cobalt and copper, each of which has a maximum...
Ligand X forms a complex with both cobalt and copper, each of which has a maximum absorbance at 510 nm and 645 nm, respectively. A 0.241 g sample containing cobalt and copper was dissolved and diluted to a volume of 100.0 mL. A solution containing ligand X was added to a 50.0 mL aliquot of the sample solution and diluted to a final volume of 100.0 mL. The measured absorbance of the unknown solution was 0.447 at 510 nm and...
Ligand X Forms.... Ligand X forms a complex with both cobalt and copper, each of which...
Ligand X Forms....
Ligand X forms a complex with both cobalt and copper, each of which has a maximum absorbance at 510 nm and 645 nm, respectively. A 0.238-g sample containing cobalt and copper was dissolved and diluted to a volume of 100.0 mL. A solution containing ligand X was added to a 50.0 ml_ aliquot of the sample solution and diluted to a final volume of 100.0 mL. The measured absorbance of the unknown solution was 0.497 at 510...
Please help! Ligand X forms a complex with both cobalt and copper, cach of which has...
Please help!
Ligand X forms a complex with both cobalt and copper, cach of which has a maximum absorbance at 510 nm and 645 nm, respectively. A 0.217 g sample containing cobalt and copper was dissolved and diluted to a volume of 100.0 mL. A solution containing ligand X was added to a 50.0 mL aliquot of the sample solution and diluted to a final volume of 100.0 mL. The measured absorbance of the unknown solution was 0.493 at 510...
To analyze the chromium in an unknown sample 1.5623 f of the sample was pretreated and...
To analyze the chromium in an unknown sample 1.5623 f of the sample was pretreated and diluted to the exact 100 mL mark in a volumetric flask. Two 20.0 mL samples of this solution were taken. In the first sample, a Cr-EDTA complex is developed and sufficient water is added to give a total volume of 100.0 mL. In the second sample, 10.0 mL of Cr(III) standard solution at to concentration of 15 mM was added before developing the Cr-EDTA...
the molar absorptivity of the copper complex in chloroform at 436.0nm is 13,000 M-1 cm-1 which...
the molar absorptivity of the copper complex in chloroform at
436.0nm is 13,000 M-1 cm-1 which is useful
for the determination of Cu2+ concentrations as low as
10-6g/ml.
III. Interpretation of Results (a) Calibration curve Calculate the Cu2+ concentration of each standard solution in ug/mL (ug = 100 gram). Alternatively, ug/mL = ppm (part per million). Plot the net absorbance (= absorbance of standard - absorbance of blank) versus the concentration of each standard solution. sample volume 0 absorbance 0.061...
Ligand X forms a complex with both cobalt and copper, each of which has a maximum absorbance at 510 nm and 645 nm, respectively. A 0.241 g sample containing cobalt and copper was dissolved and diluted to a volume of 100.0 mL. A solution containing ligand X was added to a 50.0 mL aliquot of the sample solution and diluted to a final volume of 100.0 mL. The measured absorbance of the unknown solution was 0.447 at 510 nm and...
Ligand X Forms....
Ligand X forms a complex with both cobalt and copper, each of which has a maximum absorbance at 510 nm and 645 nm, respectively. A 0.238-g sample containing cobalt and copper was dissolved and diluted to a volume of 100.0 mL. A solution containing ligand X was added to a 50.0 ml_ aliquot of the sample solution and diluted to a final volume of 100.0 mL. The measured absorbance of the unknown solution was 0.497 at 510...
Please help!
Ligand X forms a complex with both cobalt and copper, cach of which has a maximum absorbance at 510 nm and 645 nm, respectively. A 0.217 g sample containing cobalt and copper was dissolved and diluted to a volume of 100.0 mL. A solution containing ligand X was added to a 50.0 mL aliquot of the sample solution and diluted to a final volume of 100.0 mL. The measured absorbance of the unknown solution was 0.493 at 510...
To analyze the chromium in an unknown sample 1.5623 f of the sample was pretreated and diluted to the exact 100 mL mark in a volumetric flask. Two 20.0 mL samples of this solution were taken. In the first sample, a Cr-EDTA complex is developed and sufficient water is added to give a total volume of 100.0 mL. In the second sample, 10.0 mL of Cr(III) standard solution at to concentration of 15 mM was added before developing the Cr-EDTA...
the molar absorptivity of the copper complex in chloroform at
436.0nm is 13,000 M-1 cm-1 which is useful
for the determination of Cu2+ concentrations as low as
10-6g/ml.
III. Interpretation of Results (a) Calibration curve Calculate the Cu2+ concentration of each standard solution in ug/mL (ug = 100 gram). Alternatively, ug/mL = ppm (part per million). Plot the net absorbance (= absorbance of standard - absorbance of blank) versus the concentration of each standard solution. sample volume 0 absorbance 0.061...
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