The absorbance of compound A was measured in a 1.00 cm cuvette at 238 nm. A 3.96 x 10* M solution of compound A exhibited an absorbance of 0.624. A blank solution containing only the solvent had an absorbance of 0.029 at the same wavelength. (a) (i) Calculate the molar absorptivity of compound A in m' mole". (i) The absorbance of an unknown solution of Compound A in the same solvent and cuvette was 0.375 at 238 nm. Find the concentration of A in the unknown. (i) A concentrated solution of Compound A in the same solvent was diluted from an initial volume of 2.00ml to a final volume of 25 ml and then had an absorbance of 0.733 under the same conditions. What is the concentration of A in the concentrated solution?

The absorbance of compound A was measured in a 1.00 cm cuvette at 238 nm. A 3.96 x 10* M solution of compound A exhibited an absorbance of 0.624. A blank solution containing only the solvent had an absorbance of 0.029 at the same wavelength. (a) (i) Calculate the molar absorptivity of compound A in m' mole". (i) The absorbance of an unknown solution of Compound A in the same solvent and cuvette was 0.375 at 238 nm. Find the concentration of A in the unknown. (i) A concentrated solution of Compound A in the same solvent was diluted from an initial volume of 2.00ml to a final volume of 25 ml and then had an absorbance of 0.733 under the same conditions. What is the concentration of A in the concentrated solution?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter26: Molecular Absorption Spectrometry

Section: Chapter Questions

Problem 26.32QAP

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