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Absorbance values for five standard solutions of a colored solute were determined at 410 nm with a 1.00-cm path length, giving the following table of data:
Solute concentration (M) |
A |
0.250 |
0.165 |
0.500 |
0.317 |
0.750 |
0.510 |
1.000 |
0.650 |
1.250 |
0.837 |
The absorbance of a solution of unknown concentration containing the same solute was 0.400. (a) What is the concentration of the unknown solution? (b) Determine the absorbance values you would expect for solutions with the following concentrations: 0.4 M, 0.6 M, 0.8 M, 1.1 M. (c) Calculate the average molar absorptivity of the compound and determine the units of molar absorptivity.
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