Question

The goal of this experiment is to separate a mixture of two unknown compounds into individual Components and to identify the compounds. Answer the questions below. More than one answer may be possible. Why do we need to be especially careful when working with diethyl ether? Fumes can cause drowsiness & dizziness, and in high concentration, loss of consciousness Because it is highly acidic and can burn the skin Because it is extremely volatile and flammable. Of all of the unknowns, which compounds can be separated from the unknown mixture by extraction with NaOH solution? Biphenyl benzhydrol p-acetophetidide propyl 4-hydroxybenzoate triphenylmethane caffeine phenylacetic acid 4'-bromoacetanilide 2' - bromoacetanilide What developing solvents are recommended for the TLC procedure? Hexanes combination of hexanes & ethyl acetate combination of hexanes & ethyl acetate + drop of acetic if streaking occurs What are you going to use to identify the unknown compounds? Melting point and R_f values. Mass of the unknown after recrystallization. Infrared & NMR spectra

Answer 1

Diethyl ether is extreamly Volahile and flammable: Diethyl ether is not acidic. Tomes of diethyl ether can cause drowlineas & dizzined and in high concentration lolu of consciousne& Therefore italement 1 and 3 are correct C2H5-0-C2Hg in dicthyl ether. There is no functional group in it that makes it acidic. H O . . - Any compound which forms sonic product on reaction with Naoh can be extracted veing naoh solution Bipheny! Oh No Ionic product Bewghydrol on Tonie product Peacetophe ridide ohly No Tonic Product Propyl 4-heychary benzoak 0445 Ionic Product driphenyl methane OyNO Ionic Producho . caffeine Off NO Ionic product Sheryl acetic acid OHT Agent Ard Ionic product 4- Bromo ácetanilide 7. NO sonic product. 2- Bromo acetamilide No Ionic product,

The developing solvent should have some polarity to Henåne has no Polarity so ethylacetate must be mixed with hexane to adjult the polar nature of hexane tethylacetate solcchion.. Acetic acid should be added in drone to further : increase the polarity of solvent misture and avoid the threaking by redeicing the attractive forced between compound and stationary phare. s. Statement 2 and 3 ou correcto Melting point of Rf valued and infrared & NMR spectra are vieful to dentity the composet. mas of unknown alone in not enough to identity it.