given the following results " create a “standard curve” (a graph) that shows the concentration on the x-axis and the absorbance on the y-axis" and "a solution of copper(II) sulphate with an unknown concentration was found to have an absorbance of 0.09. Use your standard curve to determine its concentration" ample Number Concentration of Copper(II) Sulphate (mM) Measured Absorbance 1 0 0 2 50 0.12 3 100 0.24 4 150 0.35 5 200 0.47
given the following results " create a “standard curve” (a graph) that shows the concentration on the x-axis and the absorbance on the y-axis" and "a solution of copper(II) sulphate with an unknown concentration was found to have an absorbance of 0.09. Use your standard curve to determine its concentration"
|
ample Number |
Concentration of Copper(II) Sulphate (mM) |
Measured Absorbance |
|
1 |
0 |
0 |
|
2 |
50 |
0.12 |
|
3 |
100 |
0.24
|
|
4 |
150 |
0.35 |
|
5 |
200 |
0.47 |
|
Unknown |
40 |
0.09 |
According to Lambert Beer, when a monochromatic light is passed through a transparent solution then the absorbance of the solution is directly proportional to the concentration of the solution (c) and the path length the light travelled.
Here we are required to find the unknown concentration of the copper sulphate from the calibration curve.
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