1. A two-component mixture is analyzed by paper TLC. Component A is more soluble in the mobile phase thancomponent B. The following result is obtained. Calculate the R,for each component and label the identity of eachspot. 2Solvent Front-A0-2.6km-3CMB00.7kmSpotting Line8.492. Which one is the more polar component? Explain3. If a more polar solvent (mobil phase) is used for the above experiment, the result will be:a) Both component A and Component B will travel further up the plateb) Only Component A will travel further up the platc) Only Component B will travel further up the platd) They will travel on the plate the same distance as when a less polarChoose one of the answers and explain4. Paper chromatography works as the same principle as TLC however, cellulose paper (the same as filter paper) isused for stationary phase. An unknown liquid sample is analyzed using paper chromatography using solvent X as themobile phase. One spot is observed after the plate is developed and visualized. The same unknown substance is re-analyzed using solvent Y as the mobile phase. This time, three spots are observed after the plate is developed andvisualized. Is the unknown sample a pure substance or a mixture? Explain your answer, including a possible reasonfor the different observations in the two experiments5. Column Chromatography works by the same principle as TLC however the silica gel is not plated on a plate but it ispacked into a glass (or plastic column) and the eluting solvents runs down a column by gravitational pull.The mixture from question 1 (above) is analyzed by column chromatography using the same mobile phase and asilica gel stationary phase. Which component has the shorter retention time? Explain your answer. (Assume thesame type of binding forces between the components and the stationary phase are present in both paperchromatography and column chromatography.)

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1. A two-component mixture is analyzed by paper TLC. Component A is more soluble in the mobile phase than component B. The following result is obtained. Calculate the Rifor each component and label the identity of each spot. 2 Solvent Front A0-2.6m 30M Spotting Line 04

1. A two-component mixture is analyzed by paper TLC. Component A is more soluble in the mobile phase than component B. The following result is obtained. Calculate the Rifor each component and label the identity of each spot. 2 Solvent Front A0-2.6m 30M Spotting Line 04

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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A student performed three DCM layer titrations in Part 2 and they reported the following measurements: Final Burette Reading Initial Burette Reading Volume of DCM Aliquot Final Burette Reading Initial Burette Reading Volume of Sodium Thiosulfate Determination #1 Determination #2 Determination #3 29.99 mL 22.78 mL 7.21 mL 28.56 mL 1.21 mL 27.35 mL 37.45 mL 29.99 mL 7.46 mL 28.89 mL 1.08 mL A 27.81 mL 44.86 mL 37.45 mL 7.41 mL 28.68 mL 1.00 mL 27.68 mL Which determinations were the student's 'best two'? Calculate the percent difference for the 'best two' and show the complete calculation. Note that the concentration of standard sodium thiosulfate, which the student used, is unknown.
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