Question

A student measures k for a certain blue dye to be 200.4 M-1 at 560 nm. What is the molarity of the blue dye in a solution with an absorbance of 0.118 at this wavelength

Answer 1

5.89x10⁻⁴ M

Step-by-step explanation:

We can solve this problem by using the following formula:

• A = k*C

Where A is the absorbance, k is the constant characteristic for each substance, and C is the molar concentration of the analyte.

We input the data given by the problem:

• 0.118 = 200.4 M⁻¹ * C

And solve for C:

• C = 5.89x10⁻⁴ M