1. Solutions of fluorene (diphenylmethane) in benzene can be analyzed by making use of its absorbance at 301 nm wavelength. If a solution of fluorene of unknown concentration in benzene exhibits an absorbance of 0.720 in a 1.00-cm cuvette cell. What is the concentration of fluorene? (Ans. c = 6.55 x10-5 M)
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1. Solutions of fluorene (diphenylmethane) in benzene can be analyzed by making use of its absorbance at 301 nm wavelength. If a solution of fluorene of unknown concentration in benzene exhibits an absorbance of 0.720 in a 1.00-cm cuvette cell. What is the concentration of fluorene? (Ans. c = 6.55 x10-5 M)
2. If, with a beam of monochromatic light, 65.0% of the incident light is absorbed in its passage through a column of a certain colored solution, what is the absorbance of the solution? (Ans. A = 0.456)
3. A 1.0x10-3 M solution of a dye X shows an absorbance of 0.20 at 450 nm wavelength and an absorbance of 0.05 at 620 nm wavelength. Calculate the extinction coefficient for each wavelength. (Ans. e450 = 200 ; e620 = 50)
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