Qhov sib txawv tseem ceeb ntawm kev sib koom ua ke thiab tom qab nag lossis daus yog tias hauv coprecipitation, nag lossis daus ntawm qhov tsis xav tau tshwm sim nrog rau nag lossis daus ntawm qhov xav tau qhov chaw, thaum nag lossis daus, nag lossis daus ntawm qhov tsis xav tau tshwm sim tom qab nag lossis daus. xav tau compound.
lo lus nag lossis daus yog hais txog kev tsim cov khoom loj los ntawm kev daws tom qab kho cov tshuaj nrog qee cov tshuaj. Coprecipitation thiab tom qab nag lossis daus yog ob hom txheej txheem nag lossis daus uas muaj qhov zoo thiab qhov tsis zoo, nyob ntawm qhov xwm txheej thiab lub hom phiaj ntawm kev tsom xam.
Kev Coprecipitation yog dab tsi?
Coprecipitation yog ib hom nag lossis daus uas cov tshuaj soluble hauv cov tshuaj raug tshem tawm thaum lub sijhawm nag lossis daus. Muaj peb hom loj ntawm txoj kev coprecipitation. Cov no yog cov adsorption nto, sib xyaw siv lead ua, thiab txhua yam nkag mus.
Nto adsorption yog hais txog kev tsim cov precipitate ntawm cov tsis xav tau compound ntawm precipitate ntawm qhov xav tau compound raws li txheej txheem adsorption. Piv txwv li, tsim cov coagulated colloids; Hauv cov tshuaj tiv thaiv ntawm cov nyiaj nitrate thiab sodium chloride, cov khoom desribale yog cov nyiaj chloride precipitate. Ntawm no, nyiaj ions tsim precipitates nrog lwm cov ions tam sim no hauv cov tshuaj.
Daim duab 01: Nyiaj Halide nag lossis daus
Mixed crystal formation yog lwm hom kev sib koom ua ke uas cov kab mob sib kis tau hloov los ntawm ion-muaj siv lead ua. Piv txwv li, nyob rau hauv nag lossis daus ntawm barium sulfate los ntawm barium chloride, coprecipitation ntawm txhuas sulfate kuj tshwm sim yog hais tias cov tshuaj muaj lead ions. Hauv txoj kev siv tshuab tshuab, tsis xav tau ions tau nkag rau hauv qhov khoob ntawm cov dej nag uas tau tsim.
Post nag xob nag cua yog dab tsi?
Post nag lossis daus yog ib hom nag lossis daus uas cov nag lossis daus ntawm qhov tsis xav tau tshwm sim tom qab tsim cov precipitate ntawm qhov xav tau. Hom nag lossis daus no tshwm sim rau saum npoo ntawm thawj precipitate. Piv txwv li, tsim cov calcium oxalate tom qab nag lossis daus ntawm magnesium oxalate.
Qhov txawv ntawm Coprecipitation thiab Post Precipitation yog dab tsi?
Precipitation yog tsim cov khoom loj los ntawm cov tshuaj tom qab kho cov tshuaj nrog qee cov tshuaj. Coprecipitation yog ib hom nag lossis daus qhov twg cov ntsiab lus soluble hauv cov tshuaj raug tshem tawm thaum lub caij los nag. Tom qab nag lossis daus yog nag lossis daus ntawm qhov thib ob, feem ntau cuam tshuam, cov khoom nyob rau saum npoo ntawm qhov pib nag lossis daus. Yog li, qhov sib txawv tseem ceeb ntawm coprecipitation thiab tom qab nag lossis daus yog tias nyob rau hauv coprecipitation, nag lossis daus ntawm ib qho chaw tsis xav tau tshwm sim nrog rau nag lossis daus ntawm qhov xav tau qhov chaw thaum, tom qab nag lossis daus, nag lossis daus ntawm qhov tsis xav tau tshwm sim tom qab nag lossis daus ntawm qhov xav tau.
Yog li ntawd, kev sib kis los ntawm impurities yog siab hauv coprecipitation piv rau tom qab nag lossis daus. Ib qho piv txwv rau coprecipitation yog nag lossis daus ntawm cov nyiaj ions nrog lwm cov ions thaum lub sij hawm cov nyiaj chloride nag lossis daus; Ib qho piv txwv rau tom qab nag lossis daus yog tsim ntawm calcium oxalate tom qab nag lossis daus ntawm magnesium oxalate.
Hauv qab infographic qhia txog qhov sib txawv ntawm kev sib koom ua ke thiab tom qab nag lossis daus.
Summary – Coprecipitation vs Post nag nag
Cov nag lossis daus yog ob hom nag lossis daus. Qhov sib txawv tseem ceeb ntawm coprecipitation thiab tom qab nag lossis daus yog tias nyob rau hauv coprecipitation, nag lossis daus ntawm ib qho chaw tsis xav tau tshwm sim nrog rau nag lossis daus ntawm qhov xav tau qhov chaw thaum, tom qab nag lossis daus, nag lossis daus ntawm qhov tsis xav tau tshwm sim tom qab nag lossis daus ntawm qhov xav tau.
