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- What structural features of Hydroxypropyl Acrylate (HPA) allow it to be detected by HPLC?Determine the purity in synthesized asprin and acetaminophen? Below is the data from my TLC plates. Standard Asprin : Rf 0.52 Acetaminophen : Rf 0.44 Synthesized Asprin: Rf 0.52 Acetaminophen: Rf 0.51The mass spectrum of 2,2-dimethylpropane shows only a very weak molecular ion peak at m/z = 72. However, a large peak at mlz = 57 is seen. Suggest a possible structure of the fragment giving rise to this large peak and suggest a reason as to why this peak is so large. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). T U Paragraph 5
- Why is it more difficult to optimize k' and α in HPLC than in GC hand written please.The Rf calculated for the TLC separation of a component of two-component mixture is determined to be equal to 2.3. Does this represent good separation or not? Explain.Differentiate the following compounds using FTIR spectrophotometer.Explain the principle of FTIR instrument.
- What is the theoretical yield for the enantiomeric resolution of 24 g of the following compound? Record your answer with two significant figures and include the appropriate units (e.g. 99 g). ОН A1. For determining the %w/w of salicylamide and caffeine in an unknown sample using acetaminophen as an internal standard using a HPLC a) Is it possible to use the λmax (273 nm) of caffeine in the experiment instead of using 254 nm? Explain your reasoning.b) What are some advantages of using the Internal Standard method for quantitation over the External Standard method?c) How is the signal intensity seen in the chromatogram affected by the wavelength used for analysis?CH3 CH3 OH H Br 100 20 3sea capillary fi in betueen salt plates 2sae 15ea LAVENUMBERS Copuright 1992 6ae. e In the space below sketch the Mass Spectrum of the compound circled above. Show up to 3 possible fragments. Be sure to note which is the base peak; and which is the molecular ion (M*). Abundance m/z -esg. 128 LOTT LEST * TRANSMITTANCE
- will be the pattern of the molecular ion peak(s) in the mass spectrum of 3-chloro-methyl-benzene (m-chloro-toluene). M+ at 126; largest peak at 76 M+ at 128; M+2 at 130, ratio 3:1 M+ at 128; M+2 at 130; ration 1:1 M+ at 128 M+ at 126; M+2 at 128, ratio 3:1 QUESTION 14 In a recrystallization, the solute is dissolved in solvent. cold room temperature hot QUESTION 15 Consider the aromatic compound 4-isopropyl-benzonițrile. (Benzonitrile is a benzene ring with the nitrile group on position 1.) How many for non-equivalent types of protons will be in its proton NMR spectrum? 4. 6Calculate the resolution required to resolve the following peaks; i) CH3N+ (MW = 28.0187) and N2+ (MW = 28.0061) ii) C2H4+ (MW = 28.0313) and CO+ (MW = 27.9949) iii) C3H7N3+ (MW = 85.0641) and C5H9O+ (MW = 85.0653) iv) 116Sn+ (At W = 115.90219) and 232Th2+ (At W = 232.03800)Exp 6. IR Spectroscopy OH NaOCI ACOH, 45-50 °C CS Scanned with CamScanner