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Phenol has a pka of 9.92 and a ρ value of 2.25. From this information, determine the Ka of 3,4- dinitrophenol.
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- if the pKa value for p-nitrophenol is 7.08, what fraction of it exists in its ionized form at (a) pH 7, and (b) pH 9?Solvent #1 is a 50:50 mixture of hexane and ethyl acetate and solvent #2 is 25% hexane. Which solvent mixture is more polar: the 50:50 mixture or the 25:75 mixture? Explain briefly What would happen to the Rf of the spots in solvent #2 compared to solvent #1? Why?Based on the IR spectrscopy, identify if the solid compound is 3-methyl-3-buten-1-ol, 1-octene, decane, benzophenone, cyclohexanol, benzoic acid, vanilin, or lidocaine?
- How do you rationalize the fact that the cyclohexane A value for phenyl (2.8) is bigger than that for isopropyl (2.21)?Rank the pKa values of acetic acid, ethanol, phenol, and explain the reason in detailBased on the IR spectrscopy, identify if the liquid compound is 3-methyl-3-buten-1-ol, 1-octene, decane, benzophenone, cyclohexanol, benzoic acid, vanilin, or lidocaine?
- Which of the two IR spectra shown below refers to a carboxylic acid? Explain your answer with IR frequency values.Would you expect 2-Chlorobutanoic acid to have higher or lower pka than 4-Chlorobutanoic acid?What are some possible explanations for why the melting point of your isolated caffeine was lower than the literature value (236°C)?
- Explain the role of trisodium citrate, Na3C6H5O7 as a component of the Benedict’s reagent for the Estimation of Glucosethe Infrared spectroscopy experiment by using(FTIR) to identify the unknow compound from the list : EthanolIsoamyl acetateHexanal1-PropanolAnisaldehydeValerophenoneBenzoic AcidCyclohexanonemethyl iso-butyl ketoneBenzyl alcoholPropionaldehydeBenzaldehydePhenylacetic acid3-methylcyclohexanoneMethanolEthyl acetatePinacolonewhich compound is represented in the picture ?given the IR spectrum for anthraquinone, specify the functional groups associated to the peaks shown
