Question

If you plot the absorbance measurements of solutions vs. their concentrations, what is the slope equal to:_______

Answer 1

Answer:

Molar absorptivity coefficient

Step-by-step explanation:

Normally, from beer's law and molar extinction coefficients, the absorbance of a solution will vary with respect to the concentration or the change in the size of the container. Now, Molar absorptivity takes care of this change/variation by dividing by both the concentration and the length or measurement of the solution that the light passes through.

Since the molar absorptivity divides both the absorbance measurements and the corresponding concentrations, we can say it is the slope of the graph because the slope will be equal to the division of corresponding values of both parameters of absorbance and concentrations.

Answer 2

The slope when we  plot the absorbance measurements of solutions should be equivalent to the molar absorptivity.

What is molar absorptivity?

In terms of chemistry, it is the measurement for how it should be strong the chemical species that should be absorbed the light at the prescribed wavelength.

It can be expressed in

$A=\varepsilon c\ell$

Here,

A =  absorbance

$\varepsilon$ = molar attenuation coefficient

c = molar concentration of  species

$\ell$ = path length

So based on this, we can say that The slope should be equivalent to the molar absorptivity.

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