Muaj ob peb lwm txoj hauv kev uas tuaj yeem siv los pib crystallization thaum khawb tsis tau: Ntxiv "cov noob siv lead ua": ib qho me me ntawm cov khoom nyoos tau txais kev cawmdim los ntawm ua ntej crystallization tau pib, los yog me ntsis ntawm cov khoom ntshiab los ntawm ib lub thawv reagent. Cov noob muaju tsim qhov chaw nucleation qhov twg cov muaju tuaj yeem pib loj hlob.
Cov txheej txheem twg tuaj yeem siv los ua kom muaj crystallization hauv cov tshuaj supersaturated?
Lub recrystallization ntawm cov kua dej ntau dhau hauv cov tshuaj supersaturated tuaj yeem pib los ntawm ntxiv ntawm cov khoom siv me me ntawm cov kua nplaum, hu ua cov noob siv lead ua. Cov noob siv lead ua muab qhov chaw nucleation uas cov crystals ntau dhau tuaj yeem pib loj tuaj.
Vim li cas dej thiaj siv los ua kom muaj crystal?
Ntxiv dej tuaj yeem sai thiab txo qis solubility ntawm ntau cov organics thiab yog li induce crystallization. … Crystallization yuav tsum pib ntawm qee qhov chaw nucleation. (Crystals loj hlob thaum molecules "zoo" mus rau ib co preexisting nto.) Qee zaum qhov no yuav tshwm sim nws tus kheej, tab sis qee zaus nws nyuaj.
Lub hauv paus ntsiab lus ntawm crystallization yog dab tsi?
Crystalization yog raws li cov hauv paus ntsiab lus ntawm solubility: cov tebchaw (cov kuab tshuaj) zoo li cov kua dej kub ntau dua (cov kuab tshuaj) dua li cov dej txias. Yog hais tias ib tug saturated kub tov yog tso cai kom txias, lub solute yuav tsis soluble nyob rau hauv cov kuab tshuaj thiab cov ntaub ntawv muaju.ntshiab compound.
Puas muaj cov pob zeb loj hlob zoo dua hauv lub teeb lossis tsaus?
Crystal loj hlob kuj xav tau lub teeb. Ib zaug ntxiv, crystals thaum kawg yuav loj hlob hauv qhov tsaus ntuj, tab sis nws yuav siv sijhawm ntev heev. Lub teeb evaporates dej raws li cua sov ua; muab lawv tso los ntawm kev tso koj lub thawv rau ntawm qhov sov, tshav ntuj windowsill thiab koj yuav tsum muaj cov iav hauv ob peb hnub.
