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 Rifor each component and label the identity of eachFrond (3-0,4)CM3D2.6cmrA (2-6-04 m = 2.2cmB C67-0.ycm=0.3cmRF (A= 2.2cm = 0.852. Lemspot. 239でSolvent FrontA0-2.6m%3D3cmSpoting Line Rf (8- 0.3cm2. Scm= 0.12%3D2. Which one is the more polar component? Explain IS morC polo Becauseits Rf Is low3. If a more polar solvent (mgbil phase) is used for the above experiment, the result will be:O Both component A and Component B will travel further up the plate-Distance may verurb) 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 experiments, The liquid sam pleis a mixtereSalvents *toseperate the camponents of the liquid5. Column Chromatography works by the same principle as TLC however the silica gel is not plated on a plate but it isBecause withn soluent Y t showspolar3sopotstoowaspacked 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.)

5. Column Chromatography works by the same principle as TLC however the silica gel is not plated on a plate but it is packed 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 a silica gel stationary phase. Which component has the shorter retention time? Explain your answer. (Assume the same type of binding forces between the components and the stationary phase are present in both paper chromatography and column chromatography.)

5. Column Chromatography works by the same principle as TLC however the silica gel is not plated on a plate but it is packed 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 a silica gel stationary phase. Which component has the shorter retention time? Explain your answer. (Assume the same type of binding forces between the components and the stationary phase are present in both paper chromatography and column chromatography.)

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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The following statements are true for any chromatographic analysis except: The analyte component interacting most strongly with the stationary phase elute faster than those with weaker interactions. On the other hand, those with least interaction with the mobile phase elute the slowest. Interactions between mobile phase-analyte - stationary phase can be both chemical and physical in nature. Chromatography is a separation technique. Electromagnetic radiation source for XPS. Gamma ray X-ray UV-Visible Infra red Radiowave The part of SEM that is responsible for the production of electrons. * Electron guns Condenser lens Secondary detector Electron beam
One of the main differences between TLC and column chromatography is the direction in which the mobile phase moves. Group of answer choices True False
The fraction of sample in the stationary phase in reverse phase liquid chromatography will increase when water is added to the mobile phase. Why?
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