If the stationary phase and the compound being tested are both polar, will theretention factor (Rf) likely be smaller or larger than if a nonpolar compound wastested? Why?1)The retention factor will likely be smaller as it has a smaller interaction withthe stationary phaseO 2)The retention factor will likely be greater as it has a smaller interaction withthe stationary phaseO3)The retention factor will likely be smaller as it has a greater interaction withthe stationary phase4)The retention factor will likely be greater as it has a greater interaction withthe stationary phase

TLC involves the separation of organic compounds from each other based on their polarity differences…

If the stationary phase and the compound being tested are both polar, will the retention factor (Rf) likely be smaller or larger than if a nonpolar compound was tested? Why? The retention factor will likely be smaller as it has a smaller interaction with O 1) the stationary phase 2) The retention factor will likely be greater as it has a smaller interaction with the stationary phase 3) The retention factor will likely be smaller as it has a greater interaction with the stationary phase 4) The retention factor will likely be greater as it has a greater interaction with the stationary phase

If the stationary phase and the compound being tested are both polar, will the retention factor (Rf) likely be smaller or larger than if a nonpolar compound was tested? Why? The retention factor will likely be smaller as it has a smaller interaction with O 1) the stationary phase 2) The retention factor will likely be greater as it has a smaller interaction with the stationary phase 3) The retention factor will likely be smaller as it has a greater interaction with the stationary phase 4) The retention factor will likely be greater as it has a greater interaction with the stationary phase

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter16: Data Processing With Excel

Section: Chapter Questions

Problem 4P

See similar textbooks

Similar questions

What would happen to the retention time of a compound if the followingchanges were made?a. Decrease the flow rate of the carrier gasb. Increase the temperature of the columnc. Increase the length of the column
The following Rf values were computed from a normal phase chromatography experiment. Arrange them from most polar to least polar. I - 0.25 II - 0.84 III - 0.56 IV- 0.67
The following Rf values were computed from a normal phase chromatography experiment. Arrange them from most polar to least polar. I - 0.25 II - 0.84 III - 0.56 IV- 0.67 Group of answer choices II > IV > III > I I > III > IV > II I > II > III > IV IV > II > III > I
The retention times for A and B compounds on the 20 m capillary column are 8.04 and 8.26 min,respectively. The peak width for A and B are 0.15 and 0.16 min, respectively. a) Calculate the average number of theoretical plates for the column.b) Calculate the average height of a theoretical plate.c) Calculate the resolution.
The retention times of two compounds A and B are 16.40 and 17.63 minutes. A species that is not retained passes through the column in 1.30 minutes. The peak widths (at the base) for A and B are 1.11 and 1.21 minutes, respectively. Calculate:a) The resolution of the columnb) The resolution between compounds A and B
If the TLC plates had been developed in a more polar solvent, would retention factors on the whole be larger, smaller, or unchanged? Briefly (1 - 2 sentences) explain your reasoning
Calculate the separation factor (or selectivity factor), between two compounds, 1 and 2, whose retention volumes are 6mL and 7mL, respectively. The dead volume of the column used is 1mL. Show that this factor is equal to the ratio of the distribution coefficients K2/K1 of these compounds tR(1)<tR(2).
Anion and cation chromatography can be achieved by modifying? A. Type of dye B. Mobile phase C. Wavelength D. Stationary phase
What would happen to the retention time of a compound if the following changes were made? 1.) Decrease the flow rate of the carrier gas 2.) Increase the temperature of the column 3.) Increase the length of the column
Which statements are true for molecular exclusion chromatography?I Molecular exclusion chromatography separates on the basis of size.II Small molecules can fit in the pores of the stationary phase and effectively pass through a larger volume, and elute last.III The pores in the stationary phase are too small for large molecules to pass through, so large molecules elute first.IV Molecular exclusion chromatography with a hydrophilic stationary phase and an aqueous solvent is called gel permeation chromatography. A. I, II, III B. III and IV C. II only D. I and II only E. I, III, and IV
Question 3 Let the retention factor of species A be 0.5, while the retention factor of species B be 0.6. If species A moves 1.0 cm how far does species B move? A. 0.60 cm B. 0.80 cm C. 1.0 cm D. 1.2 cm E. 1.6 cm
PART A: Substance A was found to have a retention times of 3.15 minutes on a 70.00-cm column. An unretained species passed through the column in 0.50 minutes. The peak width (at base) for A was 0.60 minutes. Using this information, determine the following: 1. What is the retention factor for analyte A? 2. What is the plate count for this column? 3. What is the height equivalent of a theoretical plate? PART B: Match each statement with one of these terms. A Partition coefficient B Mobile phase C Elution D Longitudinal diffusion E Stationary phase F Eddy diffusion G Retention factor H Plate number I Dead time J Retention time K Selectivity factor L Column resolution