Txoj kev recrystallization yog dab tsi?
Txoj kev recrystallization yog dab tsi?

Video: Txoj kev recrystallization yog dab tsi?

Video: Txoj kev recrystallization yog dab tsi?
Video: “Tsis Muaj Leej Twg uas Muaj Cev Nqaij Daim Tawv Yuav Khiav Dim Tau Hnub ntawm Txoj Kev Npau Taws” 2024, Kaum ib hlis
Anonim

Recrystalization . Recrystalization , tseem hu ua fractional crystallization, yog a txheej txheem rau purifying ib impure compound nyob rau hauv ib tug hnyav. Cov txoj kev ntawm purification yog raws nyob rau hauv lub hauv paus ntsiab lus hais tias lub solubility ntawm feem ntau solids nce nrog nce kub.

Yog li ntawd, dab tsi yog qhov txheej txheem ntawm recrystallization?

Recrystalization yog txoj kev tseem ceeb tshaj plaws ntawm purifying nonvolatile organic solids. Recrystalization Yuav kom yaj cov khoom yuav tsum tau purified (lub solute) nyob rau hauv ib tug tsim nyog kub hnyav. Raws li cov kuab tshuaj txias, cov tshuaj yuav saturated nrog cov kuab tshuaj thiab cov solute crystallizes tawm (reforms ib qho khoom).

Ib sab saum toj no, koj yuav xaiv cov kuab tshuaj recrystallization li cas? Cov qauv siv los ua xaiv ib qho tsim nyog recrystallization hnyav suav nrog: a.) nrhiav a kuab tshuaj nrog lub siab kub coefficient. Cov kuab tshuaj yuav tsum tsis txhob yaj lub compound ntawm qhov kub thiab txias (uas muaj xws li chav tsev kub), tab sis yuav tsum dissolve lub compound nyob rau hauv high kub.

Dab tsi yog 5 cov kauj ruam tseem ceeb ntawm recrystallization ntawm ib qho kev sib txuas?

Muaj tsib kauj ruam tseem ceeb hauv recrystallization txheej txheem : dissolving cov kuab tshuaj nyob rau hauv cov kuab tshuaj, ua ib tug gravity lim , yog tias tsim nyog, tau txais cov khoom siv lead ua ntawm cov kua nplaum, sau cov kua nplaum los ntawm lub tshuab nqus tsev lim , thiab, thaum kawg, ziab lub resulting crystals.

Dab tsi yog qhov txawv ntawm crystallization thiab recrystallization?

Recrystalization yog ua rau crystals tsim los ntawm ib crystallization txoj kev. Crystallization yog ib txoj kev sib cais. Recrystalization yog siv los ntxuav cov compound tau txais los ntawm crystallization.

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