A 5.0×10−5M5.0×10−5M solution of a compound in hexane shows an absorbance of 0.440.44 at 252nm252nm in...
A 5.0×10−5M5.0×10−5M solution of a compound in hexane shows an absorbance of 0.440.44 at 252nm252nm in a cell with a 11-cmcm light path. What is the molar absorptivity of the compound in hexane at 252nm252nm?
Homework Answers
Solution:
Absorbance (A) = 
c l
Where,
= molar absorptivity
c = concentration
l = path length
Thus,
= A / c l
= 0.440 / 11 cm x 5.5 x 10^-5 M
= 7.27 x 10^2 M-1 cm-1
= 7.27 x 10^2 L mol-1 cm-1
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