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.
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.
Solution Summary: The author explains how the concentration of unknown solution and absorbances of some solutions are to be determined. Absorbance is the amount of light absorbed by the solution.
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.
Indicate which option is false(A). Resistivity has a residual component and a thermal component.(B). In some materials resistivity increases with T and in others it decreases.(C). In insulating materials, resistivity is very low.
In ceramic materials, in relation to polymorphism, the same substance crystallizes differently when external conditions vary. Is this correct?
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell