0.718g sample of [Cr(acac)3] wasconverted completely to CrO42solution in 500 ml flask. 10 ml of thissolution was diluted with water to500 ml and the absorbance of thissolution was found to be 0.345 at A =350nm. Another standard solution ofCro4 2 with 5.25 x10-5 Mconcentration has an absorbance of0.215 at the same wave length. Thepercentage of chromium in thesample is: (Atomic mass of Cr = 52g/mol) * 5

It is an application of Lamberts beer law , where for the same wavelength of light is used in two…

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0.215 at the same wave length. The percentage of chromium in the sample is: (Atomic mass of Cr = 52 g/mol) * %3D

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

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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Question

0.718g sample of [Cr(acac)3] was
converted completely to CrO42
solution in 500 ml flask. 10 ml of this
solution was diluted with water to
500 ml and the absorbance of this
solution was found to be 0.345 at A =
350nm. Another standard solution of
Cro4 2 with 5.25 x10-5 M
concentration has an absorbance of
0.215 at the same wave length. The
percentage of chromium in the
sample is: (Atomic mass of Cr = 52
g/mol) * 5

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