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 c M. The irradiance of the emerging light is P. 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. = 11 Po P P Po = P₁ - P = log (P) = log (Po-P) = log = log Po P = Abc A bc bc A Answer Bank molar absorbtivity (e) transmittance (T) absorbance (A)
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 c M. The irradiance of the emerging light is P. 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. = 11 Po P P Po = P₁ - P = log (P) = log (Po-P) = log = log Po P = Abc A bc bc A Answer Bank molar absorbtivity (e) transmittance (T) absorbance (A)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text: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 c M. The irradiance of the emerging light is
P.
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.
=
=
Po
P
P
Po
= P₁ - P
= log (P)
=
log (Po-P)
=
= log
(P)
P
log (2)
= Abc
=
=
A
bc
bc
A
Answer Bank
molar absorbtivity (e)
transmittance (T)
absorbance (A)
Expert Solution
Step 1
- Molar absorbtivity (ε) = A/bc
where, b= path length
and c = molar concentration
- Transmittance (T) = transmitted light / incident light
= P/Po
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