Vim li cas dej yog cov kuab tshuaj zoo rau recrystallization ntawm acetanilide? Acetanilide nkag tau yooj yim yaj hauv dej kub, tab sis yog insoluble ntawm qis temps. Yog li, nws dissolves hauv dej kub tab sis crystalizes yooj yim thaum txias. … Vim charcoal insoluble, qhov sib tov tuaj yeem ua kom sov thiab cov charcoal tshem tau.
Vim li cas dej thiaj siv los ua cov kuab tshuaj hauv recrystallization?
Zoo, dej pheej yig, tsis muaj hluav taws kub, thiab koj tsis tas yuav qhuav. Ntawm qhov tod tes, koj yuav tsum tau qhuav cov crystals yog tias koj tau siv dej los ua kom rov ua dua.
dej puas tuaj yeem ua cov kuab tshuaj recrystallization?
Cov kuab tshuaj yuav tsum tau boiling tsawg (feem ntau qis dua 100C). Rau feem ntau cov organic tebchaw, dej tsis yog ib qho zoo recrystallization hnyav. Recrystallization yuav tsum tau ua siab ntev tseem ceeb yog li npaj ua siab ntev.
Vim li cas dej thiaj tsim nyog cov kuab tshuaj rau recrystallization ntawm benzoic acid?
Raws li cov kua qaub, benzoic acid yog tus neeg pub khoom noj proton, thiab thaum nws poob nws cov proton, cov benzoate ion raug them. Lub solubility ntawm benzoic acid nyob rau hauv dej ntawm chav tsev kub yog me me, tab sis cov solubility ntawm benzoate ion yog siab heev nyob rau hauv dej.
Dab tsi ua rau cov kuab tshuaj recrystallization zoo thiab yog vim li cas?
Cov qauv siv los xaiv cov kuab tshuaj recrystallization tsim nyog suav nrog: … nrhiav cov kuab tshuaj nrog qhov kub thiab txias coefficient. Cov kuab tshuaj yuav tsum tsis yaj lubqhov sib xyaw ua ke ntawm qhov kub qis (uas suav nrog chav sov), tab sis yuav tsum yaj cov khoom sib xyaw ntawm qhov kub siab.
