Thaum peb yuav cov hlau oxide daj xim daj, feem ntau nws yog hmoov, tab sis nws tsis tuaj yeem siv cov hmoov hlau oxide daj thaum peb siv nws. Nws yog qhov tsim nyog los ua cov hlau oxide daj hmoov ua kom muaj xim sib txuas. Dab tsi peb yuav tsum tau them sai sai rau txoj hauv kev no? ? Chaw tsim tshuaj paus hlau oxide daj xim yuav muab koj cov lus qhia luv luv:
Ua cov hlau oxide daj xim muab tshuaj (ferric hydroxide colloid) tuaj yeem ua rau muaj kev cuam tshuam ntau dua, tab sis nyob rau hauv cov txheej txheem ntawm kev ua cov hlau oxide daj xim muab tshuaj, peb yuav tsum them nyiaj rau qee qhov teeb meem kev ua haujlwm, txwv tsis pub nws yuav cuam tshuam rau qhov zoo ntawm cov xim muab tshuaj. Thiab qhov ua tau zoo muaj qhov cuam tshuam. Yog li dab tsi yog qhov teeb meem xav tau los saib xyuas nyob rau hauv tus txheej txheem ntawm kev npaj xim muab tshuaj?
Ntxiv 50mL dej rau 100mL beaker thiab rhaub nws kom kub npau npau, ntxiv ob peb tee ntawm cov roj nyeem cov hlau oxide daj ua rau cov dej npau npau, txuas ntxiv ua kom dej kom txog thaum cov kua liab liab, tsis kub. Teeb meem xav tau kev saib xyuas thaum lub sijhawm ua haujlwm no:
(1) Tsis txhob siv lub pas nrig iav rau do thaum lub sijhawm sim, txwv tsis pub cov tshuaj yuav dhau los ua cov nyom.
(2) Thaum lub kaw lus tawm xim liab pliv-xim av, ferric hydroxide colloid yog tsim tawm. Nyob rau lub sijhawm no, lub cua sov yuav tsum nres tam sim ntawd, txwv tsis pub dej yuav yooj yim tshwm thiab liab-xim av ferric hydroxide precipitates.
Yog li, yog tias koj xav tau muab cov xim pleev xim rau qhov ua tau zoo thiab kev ua tau zoo, thaum npaj cov xim muab tshuaj nrog hlau oxide daj, koj yuav tsum nruj ua raws li cov txheej txheem kev npaj kom raug thiab tswj hwm koj tus kheej kev coj ua haujlwm, kom tsis txhob muaj qhov cuam tshuam ntawm lag luam tsis tsim nyog. Muaj peev xwm ntawm pulp zoo.