The molar absorptivity of FD&C Yellow #5 at 430 nm is =2.43*104 M-1cm-1. The absorbance of...
The molar absorptivity of FD&C Yellow #5 at 430 nm is
=2.43*104 M-1cm-1. The absorbance
of a sample of Gatorade Lemon-Lime at 430 nm is measured as 0.27
using a 1 cm cuvette. Assuming the path length is 1 cm, calculate
the molarity of Yellow #5 in Gatorade.
Homework Answers
Given molar absorptivity, E = 2.43x104 M-1cm-1
Absorbance, A = 0.27
path length, l = 1 cm
Applying the relation,
Absorbance,A = ECl
where C = molarity of the solution
=> 0.27 = 2.43x104 M-1cm-1 x C x 1 cm
=> C = 0.27 / (2.43x104 M-1cm-1 x C x 1 cm)
=> C = 1.11x10-5 M (answer)
Add Answer to:
The molar absorptivity of FD&C Yellow #5 at 430 nm is
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(v) Estimate the wavenumber gap
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