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Please answer question 12 ONLY. (Ignore question 11.)
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- Given your choice of Flame AA, ICP-AE, XRF, El-MS, or none of these, and keeping in mind that cost matters, which would you use a. for a nondestructive measurement of a sample? b. to determine 10ppm Zn in a solution? c. to determine the amount of Br in a mixture of KBr. KCL and KI? d. to determine the number of Bratoms in a molecule of an organic liquid? e. to determine 10ppb of Fe in motor oil?Ankita, well donel You explanation for how you figured out 10m was part of the GCF was very detailed. The next step of factoring out the GCF is where many students get stuck There is more than one way to show how we get from 200p m³ – 30p m + 40m to 10m (20p-3p +4)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 Frond (3-0,4)CM3D2.6cmr A (2-6-04 m = 2.2cm B C67-0.ycm=0.3cm RF (A= 2.2cm = 0.85 2. Lem spot. 2 39で Solvent Front A0-2.6m %3D 3cm Spoting Line Rf (8- 0.3cm 2. Scm = 0.12 %3D 2. Which one is the more polar component? Explain IS morC polo Because its Rf Is low 3. 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 verur b) Only Component A will travel further up the plat c) Only Component B will travel further up the plat d) They will travel on the plate the same distance as when a less polar Choose one of the answers and explain 4. Paper chromatography works as the same principle as TLC however, cellulose paper (the same as filter paper) is used for…
- What does an IR spectrometer measure? What gives rise to the spectral features? Why is Tm (melting temperature) positive for some DSC plots and negative for others? What does it tell us about the type of polymer being analyzed?8. Why are higher resolution monochromators found in ICP-OES spectrometers than in flame AAS spectrometers?1a. Briefly explain 3 advantages and disadvantages of using ¹H-NMR for the quantitative analysis of organic compounds compared with HPLC-UV. 1b. Explain why an internal standard is needed in quantitative NMR and Indicate what information from the internal standard is required for quantitative analysis. 1c.Give 3 advantages and 3 disadvantages of GC-MS compared with GC-FID 1d . (Check the image below for q.1d)
- 1. For the above shown IR-Spectrum (Indicate the structure of the organic molecule). What are the characteristic peaks present? 2. Show (or draw) the IR spectrum, The NMR Spectrum and the Mass spectrum for Methyl Ethyl Ester. 3. Show or hand draw the IR spectrum, The NMR Spectrum and the Mass spectrum for Acetyl Salicylic acid (commonly known as Aspirin).Explain why TLC cannot be used for some volatile low molecular weight substances such as toluene.12:15 9 & h b • 3r ill %19 Belge (1) - Kaydedildi İngilizce (ABD) dilindeki metin denetlenmiyor. .. A researcher prepared mixed solutions at different concentrations and measured the absorbances with the help of a spectrophotometer. In the spectrophotometer device, the distance between the cuvette and the light diffuser is 3 cm. The absorbance values of the mixture given in the table below. Mixture V (ml) %T Absorbans Concentrations (g/l) 5 37,55 0,444 0,21M 40,89 0,372 0,26M 3 44,97 0,311 0,35M 2 67,50 0,172 0,71M 1 82,65 0,084 0,97M a) Explain how to prepare 1N H2504 solution. b) Calculate the e values and the total absorbance for each volume value opposite. c) Explain the relationship between permeability and absorbance. KT A e A E E II ...
- If you are interested in separating a mixture of volatile compounds, which technique do you think would work best? ○ ICPMS ○ HPLC О АА ○ UV/Vis O LOD GC ○ TLC11. [15'] the molar absorptivity (extinction coefficient) of benzene (C6H6) equals 100 M-¹ cm¹ at 260 nm. (Assume that this number is independent of solvent or other effects) a) What concentration would give an absorbance of 1.0 in a 1 cm cell at 260 nm? b) If the density of pure, liquid benzene is 0.8 g cm²³, what 'thickness' of pure benzene would also give an absorbance of 1.0 at 260nm?HPLC VFA analysis - why do I get so different peaks for very similar samples?
