A student made 0.15 M solution of copper sulphate. The absorbance of the solution was found to be 0.3 when using a cuvette with a path length of 1…
A student made 0.15 M solution of copper sulphate. The absorbance of the solution was found to be 0.3 when using a cuvette with a path length of 1 cm. Copper sulphate solution made by a second student gave an absorbance of 0.45 using the same cuvette at the same wavelength. What is the concentration of the copper sulphate solution made by the second student?
Select an option to attempt
Correct Answer: Option B
Explanation
Beer-Lambert Law:, where= absorbance,= molar absorptivity (constant for a given solute at a given wavelength),= concentration,= path length. Sinceandare the same for both solutions (same wavelength and cuvette):, so.