Question

A murexide soution has a concentration of 3.52x10-4M and an absorbance of 1.850. what is the molar absorptivity of the solution?

Answer 1

The question is incomplete, here is the complete question:

A murexide soution has a concentration of
`3.52* 10^(-4)M` and an absorbance of 1.850 and the path length is 1 cm. What is the molar absorptivity of the solution?

Answer: The molar absorptivity coefficient is
`5255.7M^(-1)cm^(-1)`

Step-by-step explanation:

To calculate the molar absorptivity coefficient, we use the equation given by Beer-Lambert law, which is:

`A=\epsilon Cl`

where,

A = absorbance = 1.850

`\epsilon` = molar absorptivity coefficient = ?

C = concentration of the solution =
`3.52* 10^(-4)M`

l = path length = 1 cm

Putting values in above equation, we get:

`1.850=\epsilon* 3.52* 10^(-4)M* 1cm\\\\\epsilon=(1.850)/(3.52* 10^(-4)* 1)=5255.7M^(-1)cm^(-1)`

Hence, the molar absorptivity coefficient is
`5255.7M^(-1)cm^(-1)`