Vim ligroin yog a nonpolar hnyav(muaj 6-carbon alkanes), nonpolar qauv molecules yuav yooj yim yaj hauv cov kuab tshuaj thiab tsis adsorb rau polar silica gel. Ib yam li ntawd, polar qauv molecules yuav adsorb rau cov silica gel nyob ruaj ruaj.
Ligroin yog dab tsi hauv organic chemistry?
Ligroin yog cov roj av feem ntau muaj feem ntau ntawm C7 thiab C8hydrocarbons thiab boiling hauv 90-140 ° C (194-284 ° F). Cov feem tseem hu ua hnyav naphtha. Ligroin yog siv los ua cov kuab tshuaj hauv chav kuaj. Cov khoom lag luam nyob rau hauv lub npe ligroin tuaj yeem muaj qhov kub kub li 60-80 ° C thiab tuaj yeem hu ua lub teeb naphtha.
Puas yog polar lossis tsis-polar?
Hauv cov ntsiab lus yooj yim, polar txhais tau hais tias rov qab them, thiab tsis-polar txhais tau tias sib npaug. Covalent bonds tuaj yeem yog polar lossis tsis-polar. Txhawm rau nkag siab qhov sib txawv ntawm polar thiab non-polar bonds, nws yog ib qho tseem ceeb kom nkag siab txog electronegativity.
Puas yog hydrocarbons polar lossis nonpolar?
C-C thiab C-H bonds hauv hydrocarbon molecules, xws li ethane, C2H6, tsis muaj polar, yog li hydrocarbons yog tsis yog-polar molecular tshuaj thiab hydrocarbon polymers zoo li polyethylene lossis polypropylene tsis yog polar kuj. Feem ntau cov polar polymers yog permeable rau dej ntau dua li cov tsis-polar polymers.
YPuas yog vitamin C polar lossis nonpolar?
Ascorbic acid yog cais raws li ib tug polar organic molecule vim lubmuaj plaub pawg hydroxyl.
