Question

the concentration of a solution is 0.0021 m and the molar absorptivity is 341 m-1cm-1 at a wavelength of 578 nm. what is the absorbance at 1 cm pathlength

Answer 1

The absorbance at a 1 cm pathlength is 0.7171.

Step-by-step explanation:

The absorbance of a solution can be calculated using Beer's law, which states that absorbance (A) is equal to the product of the molar absorptivity (ε), the path length (l), and the concentration (c) of the solution.

In this case, the path length is given as 1 cm. The concentration of the solution is 0.0021 M and the molar absorptivity is 341 M⁻¹cm⁻¹. Therefore, the absorbance (A) can be calculated as follows:

A = ε * c * l

A = 341 M⁻¹cm⁻¹ * 0.0021 M * 1 cm

A = 0.7171

Therefore, the absorbance at a 1 cm pathlength is 0.7171.