2. Among the three solvents used in the separation of pigments in spinach, which produced the most effective separation? Explain your choice. a. hexane b. 70:30 hexane:acetone c. 50:50 hexane:acetone
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- In most distillations, the total volume of liquid obtained (distillate + residue) is possible sources of loss in this procedure?Purification of benzoic acid 1. What is the purpose of washing the crystal in the filter paper with water? 2. How recrystallization affects the theoretical yield of sample? Explain.Explain ONE of the micro-extraction techniques based on the solid-phase. Your explanation should include:a) The principle and steps of extraction of the selected techniqueb) The advantages and disadvantages of the selected technique compared to conventional techniquesc) The potential applications of the selected techniqued) The new advancement/modifications that can be performed to improvise the selected technique
- Why does a 70:30 hexane:acetone mixture produce a more effective separation of pigments in spinach compared to a 50:50 hexane:acetone mixture? Explain thoroughlyneed this answer in detail. don't copy elsewhere I will downvote . A separation of the mixture of substances X and Y is carried out by extraction of Craig using an organic solvent of the same volume. What is the dissolved Y fraction in the 18th tube after 24 times of removal if Dy = 5 is knownWhat are emulsions? Why do they form during extractions? How is the formation of an emulsion minimized?
- a) Discuss the effect of solvent polarity on Rf-values. b)Explain how the Rf (Retention Factor)-values can be in agreement or disagreement with the “like dissolves like” principle?4-chloro-3,4-dimethylnonan-1-amine On a page titled Correct Separation Scheme print/draw a correct separation scheme toisolate your molecule from the provided second molecule. Make sure to indicate the phaseof each chemical in every step (s, l, g, aq) and write the separation technique used in eachstep (ie: vacuum filtration). The list below gives the reagents available in the lab. Use anyof the reagents below to isolate the compounds. Remember that the simplest separationscheme is the best one. Try to avoid unnecessary steps. • 10% aqueous NaOH • H2O• 5% aqueous NaHCO3 • H3PO4• 6M HCl • anhydrous Na2SO4• 5% HCl • anhydrous MgSO4• Diethyl ether (ether) • Saturated NaCl• CH3OH • Sodium borohydride (NaBH4)• lithium aluminum hydride (LiAlH4) • NaCl solidExplain how solid-phase microextraction works. Why is cold trapping necessary during injection with this technique? Is all the analyte in an unknown extracted into the fiber in solid-phase microextraction?
- In the organic chemistry experiment of an Extraction of crude napthalene and benzoic acid dissolved in ethyl acetate solvent. Why are multiple small extractions better than 1 large extraction? Explain. Prove this with mathematically.The experiment wAs preformed using a recrystallization of salicylic acid. The IR was preformed using a KBR pellet method Re-state the diagnostic peaks from the results, this time with the intention of comparing the experimental to literature diagnostic values as well as fingerprint regions to provide evidence to answer your hypothesis. After comparing your values, you must discuss what conclusions you obtained (i.e. was there evidence to support that your compound is pure?)28. In addition to what is not a characteristic of gas chromatography as listed in the probelm can you give the general characteristics of Gas Chromatography?