Answered: Assuming the use of the same stationary…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter29: Mass Spectrometry

Section: Chapter Questions

Problem 29.7QAP

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A particular mixture was seperated into three components usin paper chromatography. the Rf value of dye A is 0.78, the Rf of dye B is 0.43 and the Rf of dye C is 0.19. What component of the mixture A,B,C is most attracted in the stationery phase and why?
When stating the Rf value of a compound, why is it also necessary to state the mobile phase that was used?
The concentration of Na* in the sea water sample was determined with atomic fluorescence spectroscopy (AFS). 35.00 mL of the sea water sample produce an AFS signal of 0.425. Then, 5.00 mL of 0.00215 M Nat standard were added to another 35.00 mL of the sea water sample, and this spiked sample gives an AFS signal of 0.724. What would be the concentration of Na* in the sea water sample? 0.0268 M 0.00753 M 0.0109 M 0.587 M 0.00324 M
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If you were to try a column one-half the length of the one you usually used, how do you think the retention times of the butenes would be affected? How do you think the separation of the peaks would be affected? How do you think the width of each peak would be affected?
A particular mixture was seperated into three components usin paper chromatography. the Rf value of dye A is 0.78, the Rf of dye B is 0.43 and the Rf of dye C is 0.19. What component of the mixture A,B,C is most soluble in the mobile phase and why?
Calculate the chemical shift in ppm for a proton that has resonance at 128 hz downfield from TMS on spectophotometer that operates at 60 mhz what would be the value of shift for a spectophotometer which operates at 100 mhz
i) Find the differences between the AES and XPS in terms of principle and information obtained from the spectra. ii) Why AFM is mostly utilized microscopic method for the determination of the thickness of the film?
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Each time a mixture containing equal amounts of compounds A, B,and C is injected into a gas chromatograph, compound B gives a signal thatis only one-third the size of the signal from compound A, and compoundC gives a signal that is three times the size of the signal from the compoundA. When another mixture of these same three compounds, but which doesnot necessarily contain equal amounts of each, is injected into a gas chromatograph the area of the signals from A, B, and C are 105, 404, and 230 square units respectively. Calculate the percent of each component inthis second mixture.
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I need some help assessing the spectra of maleic anhydride how do I determine the integration, multiplicity, chemical shift for each structure/ fragment part of the maleic anhydride

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Assuming the use of the same stationary and mobile phases, how would the Rf of a compound change ifI had used a TLC plate that was twice as long as the plate used in my experiment?