There is a substance in a solution (0.03 mole/liter). The length of cuvette is 2 cm and only 10% of the certain light beam is transmitted. What is the extinction coefficient of the substance

The molar absorptivity coefficient is, .

Explanation:

Using Beer-Lambert's law :

Formula used :

where,

A = absorbance of solution

C = concentration of solution =

l = path length = 2 cm

= incident light

= transmitted light

= molar absorptivity coefficient = ?

A compound absorb 90 % of the light and transmit 10% of light.

Transmittance = 10% = 0.1

Now put all the given values in the above formula, we get the molar absorptivity coefficient.

Therefore, the molar absorptivity coefficient is, .