one: Topic Molecular Spectroscopy (16 marks) You were given an unknown mixture that contains two metal salts (A) Co(NO3)2 and (B) Cr(NO3)2 and requested to determine their concentration. The following representative information about the absorbance data were also provided. Measurements were made in a 1.0 cm quartz cells. Pure A (mol/l) Pure B (mol/l) 0 Abs @510 nm Abs @575 nm 1.5 x 101 0 6 x 102 Unknown conc in mixture 0.714 0.097 0.298 0.757 Unknown conc in mixture 0.671 0.330 How would you go about calculating the concentration of the two salts?
one: Topic Molecular Spectroscopy (16 marks) You were given an unknown mixture that contains two metal salts (A) Co(NO3)2 and (B) Cr(NO3)2 and requested to determine their concentration. The following representative information about the absorbance data were also provided. Measurements were made in a 1.0 cm quartz cells. Pure A (mol/l) Pure B (mol/l) 0 Abs @510 nm Abs @575 nm 1.5 x 101 0 6 x 102 Unknown conc in mixture 0.714 0.097 0.298 0.757 Unknown conc in mixture 0.671 0.330 How would you go about calculating the concentration of the two salts?
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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one: Topic Molecular Spectroscopy (16 marks)
You were given an unknown mixture that contains two metal salts (A) Co(NO3)2 and (B) Cr(NO3)2 and requested to determine their concentration. The following representative information about the absorbance data were also provided. Measurements were made in a 1.0 cm quartz cells.
Pure A (mol/l)
Pure B (mol/l)
0
Abs @510 nm
Abs @575 nm
1.5 x 101
0
6 x 102
Unknown conc in mixture
0.714
0.097
0.298
0.757
Unknown conc in mixture
0.671
0.330
How would you go about calculating the concentration of the two salts?
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