Chemistry absorptivity

Question

A 100.0 mM solution particular colored solution has an absorbance of 0.342 at a wavelength of 545 nm when measured in a 2.00 cm cuvet. Calculate the molar absorptivity of the absorbing compound.

Answer 1

Beer-Lambert: A = ecl

A = absorbance

e = extinction = molar absorptivity

c = concentration (M)

l = path length (cm)

0.342 = e(0.1)(2)

e = 1.71 M^-1cm^-1