# Problem: A student finds a solution of blue dye #2 (another food dye we are not using in this lab) in a 1.0 cm cuvette has a maximum absorbance of 0.572 at 613 nm. The molar extinction coefficient, E, of blue #2 at the same wavelength is 1.21 x 104 M-1 cm-1. Calculate the concentration of this solution.

###### FREE Expert Solution

The absorbance of a solution is related to its concentration by the Beer-Lambert law.

Where,

A = absorption

ε = molar absorptivity

b = path length of solution

c = molar concentration

We have the following data for solution A:

A = 0.572

b = 1.0 cm

ε = 1.21 x 104 M-1 cm-1

c = concentration

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###### Problem Details

A student finds a solution of blue dye #2 (another food dye we are not using in this lab) in a 1.0 cm cuvette has a maximum absorbance of 0.572 at 613 nm. The molar extinction coefficient, E, of blue #2 at the same wavelength is 1.21 x 104 M-1 cm-1. Calculate the concentration of this solution.

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Calculate Molarity concept. You can view video lessons to learn Calculate Molarity. Or if you need more Calculate Molarity practice, you can also practice Calculate Molarity practice problems.