Due Date 12 1 Sapling Learning Points Possible A beam of light with an irradianc

Question

Due Date 12 1 Sapling Learning Points Possible A beam of light with an irradiance of Po passes through a solution of a substance that can absorb some of the light. The pathlength of the solution is b cm, and the molar concentration of the substance is cM. The irradiance of the emerging light is P Grade Category Description: Policles: 13 0 o 14 0 0 15 2 16 1100 Absorbance (A), transmittance (T) and molar absorptivity (e) are quantities calculated from these values. Identify the expression used for calculating each of these three quantities by dragging the quantity into the box next to the expression 95 You can check You can view give up on any qu You can keep tryir until you get it righ -log( -Abc 17 0 18 C 19 0 You lose 5% ofthe answer in your que attempt at that ans log O eTextbook Help with This Topio 21 22 0 O absorbance molar absorbtivity (etranstinitance(T absrbance (A) O Web Help & Videos Which of these three quantities is proportional to concentration? molar absorptivity cal Support and

Explanation / Answer

concentration can be always related to:

Beer’s Law

A = e*l*C

A = absorbance of sample

e is the molar absorptivity , the typical units are 1/M-cm

l size of cuvette, typically reported in cm

c is the molar concentration, in mol per ltier or M

therefore

A = e*l*C

C = A/(e*l)

assume = A abosrption, e = b, c = l

therefore

choose:

absorbance,

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