Assignment

1. The molar extinction coefficient of a solution of concentration 0.04 M and thickness 10.5 cm is 80.08 L mol^-1 m^-1. Find the value of optical density.
2. Absorbance of a solution is found to be 0.83. Calculate % Transmittance.
3. When a wavelength of 250 nm is passed through a solution, the light intensity is reduced to 20% of its initial value. Then absorbance is given by _____.
4. The absorbance of 1 mm of a sample solution whose concentration is 0.03 M is _____. (Given that the molar absorption coefficient is 10 L mol^-1 m^-1).
5. An unknown solution showed absorbance 5.000 and molar absorption coefficient ε = 160 L mol^-1 m^-1, (thickness, l = 2 cm). Calculate the concentration of the solution.