Assignment:
A solvent called "mixed xylenes" contains the o-xylene, m-xylene, p-xylene and ethyl benzene. In the table below, the absorbances of each of the pure components and the absorbance of a sample of "mixed xylenes" were measured at four different wavelengths.
All measurements used the same cell and, therefore, the same pathlength. What is the concentration of each compound? (Use the determinant function in EXCEL).
For the pure compounds, where A = εbX, assume X = 1
values of ε(molar absorptivity)b
|
Wavelength(mm)
|
p-xylene
|
m-xylene
|
o-xylene
|
ethylbenzene
|
unknown
|
|
12.5
|
1.5020
|
0.0514
|
0.000
|
0.0408
|
0.1013
|
|
13.0
|
0.0261
|
1.1516
|
0.000
|
0.0820
|
0.09943
|
|
13.4
|
0.0342
|
0.0355
|
2.532
|
0.2933
|
0.2194
|
|
14.3
|
0.0340
|
0.0684
|
0.000
|
0.3470
|
0.03396
|
Provide complete and step by step solution for the question and show calculations and use formulas.