Anhydrous sodium sulfate ua haujlwm li cas

Lub luag haujlwm tseem ceeb ntawm anhydrous sodium sulfate yog ua los ntawm desiccant, tshem tawm cov dej los ntawm cov organic tebchaw, tshwj xeeb tshaj yog cov kuab tshuaj, los ntawm kev tsim cov hydrated crystals nrog dej molecules.

Cov tshuaj formula ntawm sodium sulfate yog Na2SO4, uas muaj ntau hom: anhydrous, decahydrate, heptahydrate, thiab pentahydrate. Txawm li cas los xij, daim ntawv anhydrous yog cov desiccant feem ntau siv vim nws tuaj yeem tshem tawm cov dej noo ntawm cov kua. Nws mechanism ntawm kev txiav txim yog raws li lub hauv paus ntsiab lus ntawm lub cev qhuav dej. Nyob rau hauv lub xub ntiag ntawm dej, anhydrous sodium sulfate absorbs dej los ntawm ib tug txheej txheem hu ua adsorption. Cov txheej txheem no suav nrog cov dej molecules adhering rau saum npoo ntawm sodium sulfate hais. Raws li ntau cov dej molecules yog adsorbed, sodium sulfate hais pib tsim hydrated crystals, uas yuav yooj yim lim los yog tshem tawm ntawm cov kua. Thaum lub hydrated siv lead ua tau tsim, anhydrous sodium sulfate tsis tuaj yeem nqus dej molecules ntxiv lawm, vim tias txhua qhov chaw muaj nyob rau ntawm qhov chaw me me twb tau nyob hauv dej molecules. Qhov no txhais tau hais tias anhydrous sodium sulfate tau mus txog nws lub peev xwm nqus dej siab tshaj plaws thiab tsis tuaj yeem tshem tawm cov dej los ntawm cov kua.

Cov hydrated crystals ntawm sodium sulfate tau yooj yim txawv ntawm daim ntawv anhydrous vim lawv feem ntau yog dawb thiab hmoov, thaum daim ntawv anhydrous feem ntau yog crystalline thiab granular. Tsis tas li ntawd, hydrated crystals yog soluble hauv dej, thaum cov ntaub ntawv tsis muaj dej tsis zoo. Hauv cov ntawv thov kev lag luam, anhydrous sodium sulfate feem ntau yog siv los ua tus neeg sawv cev ziab rau cov kuab tshuaj, nrog rau kev tsim cov tshuaj detergents thiab iav. Hauv chav kuaj, nws feem ntau yog siv los ntxuav cov organic tebchaw thiab tshem tawm cov dej los ntawm cov tshuaj tiv thaiv.

Hauv cov ntsiab lus, anhydrous sodium sulfate yog ib qho zoo thiab siv dav siv desiccant, uas tsim cov hydrated crystals nrog dej molecules kom tshem tawm cov dej noo ntawm cov kua. Nws cov txheej txheem ntawm kev ua haujlwm yog ua raws li lub hauv paus ntsiab lus ntawm lub cev qhuav dej thiab feem ntau yog siv rau hauv ntau yam kev lag luam thiab kev sim.