Question #8c507

1 Answer
Jul 31, 2017

Answer:

Rearrangement of Beer's law

Explanation:

Beer's law states that you can determine the absorbance (A) with three factors: molar absorptivity (#epsilon#), path length (b), and concentration (c). Absorbance has no units. Path length is usually 1 cm. The molar absorptivity is measured in #L*mol^-1*cm^-1#. Concentration is in #mol*L^-1#.

#A=epsilonbc#

If you rearrange the equation, you can solve for concentration.

#c=A/(epsilonb)#