# Worksheet: The Beer–Lambert Law

In this worksheet, we will practice using the Beer–Lambert Law to calculate absorption from the molar extinction coefficient, path length, and concentration.

Q1:

According to the Beer–Lambert law, which two variables are linearly correlated if the path length of the cell is held constant?

• AConcentration and wavelength
• BTransmission intensity and concentration
• CTransmission intensity and wavelength
• DAbsorbance and concentration

Q2:

Which of the following describes the correct relationship between absorbance and transmission?

• A
• B
• C
• D

Q3:

An absorbance value of zero corresponds to 100% transmittance. What transmittance value corresponds to an absorbance value of 2?

• A0%
• B98%
• C1%
• D80%

Q4:

Which variable in Beer’s law represents how well a chemical species absorbs light at a given wavelength?

• A—wavelength
• B—absorbance
• C—molar absorptivity coefficient
• D—path length of the sample
• E—concentration

Q5:

According to the Beer–Lambert Law, what happens to the absorbance reading if the concentration of a solution is halved?

• AThe absorbance is quartered.
• BThe absorbance is halved.