Answered: Benzene and toluene, when analysed…

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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Benzene and toluene, when analysed isothermally on a 25 m × 0.25 mm i.d. capillary GC column, were found to have retention times of 8.56 and 8.67 min, respectively. An unretained solvent passed through the column in 4.10 min in the same analysis. The peak widths at half height for benzene and toluene were 4.2 and 4.3 seconds, respectively. Calculate: a) The capacity factor for each of these compounds b) The selectivity factor for the separation c) The average number of plates for the column d) The resolution between benzene and toluene. Are they completely separated under these conditions? e) What is the plate height (H) for this column? What can you say about the efficiency of this column? Explain f) The dimensions of a column with the same phase ratio required to obtain a resolution of 1.5 under otherwise identical conditions

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