Question

A compound having concentration 10-3 g/L resulted absorbance value of 0.20 at maximum absorpance wavelength of 510 nm using 1.0 cm cell. Calculate the absorptivity and molar absorptivity values. Molecular weight of compound is 400.

Answer 1

The value of molar absorptivity coefficient is 200 m²/mol

Explanation:

The absorbance is given by the formula:

A = εcl

Where,

A = Absorbance = 0.20

ε = Molar absorptivity coefficient = ?

c = Concentration of the material = 10⁻³ g/L

l = Pathlength = 1.0 cm

On substituting the values, we get,

0.20 = ε × 10⁻³ × 1.0

0.20 = ε × 10⁻³

ε = 0.20/10⁻³

∴ ε = 200 m²/mol

Answer 2

Answer:

80000

Explanation:

last one answer is 80000 of molar absorbtivity