2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txawm li cas los xij, acetone tseem suav tias yog a polarprotic kuab tshuaj , txawm tias qhov tseeb tias nws yog acidic, thiab tsis muaj acidic tsawg dua li cawv. Ces dua, acetone (thiab lwm yam carbonyl muaj cov kuab tshuaj ) yog, qhov tseeb, pluag cov kuab tshuaj Thaum siv cov hauv paus muaj zog vim lawv cov acidity siab.
Ib yam li ntawd, nws raug nug, yam tshuaj hnyav npaum li cas yog acetone?
Acetone , los yog propanone, yog cov organic compound nrog cov mis (CH3)2CO. Nws yog cov kua tsis muaj xim, tsis muaj zog, flammable thiab yog qhov yooj yim thiab tsawg tshaj plaws ketone. Acetone yog miscible nrog dej thiab ua haujlwm tseem ceeb kuab tshuaj nyob rau hauv nws tus kheej txoj cai, feem ntau yog rau tu lub hom phiaj inlaboratories.
Ib sab saum toj, puas yog acetone heev polar? Acetone yog a polar molecule vim nws hasa polar daim ntawv cog lus, thiab cov qauv molecular tsis ua rau lub dipole raug tshem tawm. C yog me ntsis electronegative dua H(2.4 vs. 2.1).
Yog li ntawd, THF puas yog polar aprotic hnyav?
Hydrophilic GO yog tsis zoo exfoliated nyob rau hauv nonnaqueous cov kuab tshuaj , np., polar aprotic kuab tshuaj xws li N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), thiab tetrahydrofuran tshuaj ( THF ).
Puas yog cawv yog cov kuab tshuaj polar?
Feem ntau, pawg hydroxyl ua cawv polar . Cov pab pawg no tuaj yeem tsim cov ntawv cog lus hydrogen rau ib leeg thiab rau feem ntau lwm cov tebchaw. Nrog rau lub xub ntiag ntawm lub polar OH cawv yog dej-soluble ntau dua li cov hydrocarbons yooj yim. Methanol, ethanol , thiab propanol yog misciblein dej.
Pom zoo:
Puas yog qhov hnyav lossis qhov hnyav?
Qhov loj ntawm ib yam khoom yog ib qho kev ntsuas ntawm cov khoom inertial khoom, los yog tus nqi ntawm cov khoom nws muaj. Qhov hnyav ntawm ib yam khoom yog ib qho kev ntsuas ntawm lub zog ntawm qhov khoom los ntawm lub ntiajteb txawj nqus, lossis lub zog xav tau los txhawb nws. Qhov rub ntawm lub ntiajteb txawj nqus ntawm lub ntiaj teb muab ib yam khoom ib tug downward acceleration ntawm txog 9.8 m / s2
Puas yog THF polar aprotic?
Polarity yog qhov txuas ntxiv. Thaum peb txhua tus tuaj yeem pom zoo tias pentane yog "tsis yog-polar", thiab dej yog "polar", muaj cov xwm txheej ciam teb xws li diethylether, dichloromethane, thiab tetrahydrofuran (THF) uas muaj ob qho tib si polar thiab non-polarchacteristics
Dab tsi ua rau TLC hnyav hnyav?
Solvent (Mobile Phase) Kev xaiv cov kuab tshuaj zoo yog tej zaum qhov tseem ceeb tshaj plaws ntawm TLC, thiab kev txiav txim siab qhov hnyav tshaj plaws yuav xav tau kev sim thiab qhov yuam kev. Raws li nrog kev xaiv phaj, nco ntsoov cov tshuaj lom neeg ntawm cov analytes. Ib qho pib hnyav yog 1: 1 hexane: ethyl acetate
Vim li cas dej thiaj li yog ib qho hnyav hnyav rau lub neej?
Dej yog hu ua 'universal solvent' vim hais tias nws muaj peev xwm ntawm dissolving ntau tshaj li lwm yam kua. Qhov no tseem ceeb heev rau txhua yam muaj sia nyob hauv ntiaj teb. Nws txhais tau hais tias txhua qhov chaw dej mus, los ntawm huab cua, hauv av, lossis los ntawm peb lub cev, nws yuav siv cov tshuaj muaj txiaj ntsig, cov zaub mov, thiab cov as-ham
Qhov txawv ntawm qhov hnyav thiab qhov hnyav yog dab tsi?
Raws li lub npe qhov sib txawv ntawm qhov hnyav thiab hnyav yog tias lub nra yog lub nra; qhov hnyav yuav tsum tau nqa thaum qhov hnyav yog lub zog ntawm ib qho khoom vim qhov kev sib tw ntawm nws thiab lub ntiaj teb (lossis yam khoom siv astronomical nws feem ntau cuam tshuam los ntawm)