Video: Vim li cas cov kuab tshuaj txav mus rau hauv daim ntawv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Raws li cov dej nkag up daim ntawv , cov xim yuav cais tawm mus rau hauv lawv cov khoom. Capillary action ua rau cov kuab tshuaj taug kev up daim ntawv , qhov twg nws ntsib thiab dissolves tus number case. Cov kua nplaum yaj (theem mobile) maj mam mus up daim ntawv (cov theem nyob ruaj ruaj) thiab cais tawm mus rau hauv cov khoom sib txawv.
Ib yam li ntawd, nws raug nug, vim li cas qee cov tshuaj tsis txav mus rau daim ntawv chromatography?
Vim tias lawv siv sijhawm ntau yaj nyob rau theem nyob ruaj khov thiab sijhawm tsawg dua hauv theem mobile, lawv tsis yog mus taug kev ceev heev nce tus ntawv . Txoj kev nyiam rau ib qho chaw sib faib nws lub sij hawm ntawm ob qho tib si immiscible solvents (cov kuab tshuaj xws li hexane thiab dej uas yuav tsis sib tov) yog hu ua partition.
Kuj Paub, ntawv chromatography ua haujlwm li cas? Chromatography yog ib txoj hauv kev sib cais cov sib tov los ntawm kev siv cov kuab tshuaj txav ntawm cov lim ntawv . Ib qho kev sib tov sib xyaw yog pom nyob ze ntawm ib kawg ntawm qhov ntawv thiab ces qhuav. Qhov kawg ntawm ntawv , nyob ze ntawm qhov chaw, ces dipped rau hauv cov kuab tshuaj yam tsis tau submerging qhov chaw nws tus kheej.
Tom qab ntawd, lo lus nug yog, dab tsi yuav tshwm sim thaum lub sij hawm hnyav tsiv teb tsaws ntawm daim ntawv?
Raws li cov kuab tshuaj maj mam mus up daim ntawv , cov khoom sib txawv ntawm cov kua roj vanish sib txawv ntawm cov nqi sib txawv thiab cov khoom sib xyaw tau muab cais ua cov xim sib txawv. Daim duab qhia tias lub phaj yog dab tsi muaj peev xwm zoo li tom qab lub kuab tshuaj tau tsiv mus yuav luag rau saum.
Vim li cas cov dej nkag mus hauv daim ntawv piav qhia qhov no?
Dej creeps up daim ntawv vim kev ua ntawm capillary. Qhov no yog thaum sib txuas ntawm cov kua molecules rau lawv tus kheej yog tsawg dua qhov attraction rau lwm yam khoom ntawm molecules yog kov.
Pom zoo:
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Vim li cas lub caij nplooj ntoos hlav ncab hauv koj qhov kev sim thaum cov khoom txav mus rau hauv txoj kev ncig?
Feem ntau, cov khoom txav mus rau hauv txoj kev ncig vim lub caij nplooj ntoos hlav yog lub zog ntawm cov khoom mus rau qhov chaw ntawm txoj kev ncig. Muaj kev tsis sib haum xeeb ntawm lub zog no thiab cov khoom inertia. Yog li ntawd lub caij nplooj ntoos hlav stretches tawm vim hais tias ntawm cov khoom tangential ceev thiab inertia?
Cov tshuaj tiv thaiv zoo li cas thaum cov tshuaj nkag mus rau hauv cov hlab ntsha?
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Vim li cas cov qauv ntawm cov dej ua rau nws muaj cov kuab tshuaj zoo?
Dej muaj peev xwm yaj ntau yam khoom sib txawv, uas yog vim li cas nws yog ib qho hnyav hnyav. Cov dej molecules muaj lub ntsiab lus ntawm cov pa oxygen thiab hydrogen atoms - ib sab (hydrogen) muaj qhov zoo hluav taws xob thiab lwm sab (oxygen) muaj qhov tsis zoo
Vim li cas CDCl3 yog siv los ua cov kuab tshuaj rau sau cov NMR spectrum ntawm ib qho kev sib txuas?
Nws tuaj yeem tau yooj yim sib cais los ntawm kev sib xyaw tom qab dissolving vim tias nws yog volatile nyob rau hauv cov xwm, thiaj li yuav yooj yim evaporated. Vim muaj cov tsis-hydrogen atom nws tsis cuam tshuam rau kev txiav txim siab ntawm NMR spectrum. Raws li nws yog cov kuab tshuaj deuterated yog li nws lub ncov tuaj yeem txheeb xyuas tau yooj yim hauv NMR nrog kev siv ntsuas TMS