Cov Khoom Siv Lub Cev: Sodium dithionite yog ib hom khoom siv uas yooj yim hlawv tau qib 1. Nws kuj hu ua Rongalite. Hauv kev lag luam, nws muaj ob hom: Na₂S₂O₄·2H₂O thiab Na₂S₂O₄ uas tsis muaj dej. Tus thawj yog ib hom siv lead dawb zoo, thaum tus tom kawg yog ib hom hmoov daj daj. Nws qhov ceev yog 2.3-2.4. Nws lwj thaum kub liab, yaj hauv dej txias tab sis lwj hauv dej kub. Nws tsis yaj hauv ethanol. Nws cov kua dej tsis ruaj khov thiab muaj cov khoom txo qis muaj zog heev, ua rau nws yog ib hom neeg txo qis muaj zog.
Thaum raug cua, nws yooj yim nqus tau cov pa oxygen thiab oxidizes. Nws kuj yooj yim nqus cov dej noo, tsim cua sov thiab lwj. Nws tuaj yeem nqus cov pa oxygen los ntawm huab cua, ua cov pob, thiab tso tawm cov ntxhiab tsw qab.
Na₂S₂O₄ + 2H₂O + O₂ → 2NaHSO₄ + 2[H]
Kev ua kom sov lossis kov nrog nplaim taws qhib tuaj yeem ua rau kub hnyiab. Nws qhov kub uas nws tus kheej kub hnyiab yog 250°C. Kev kov nrog dej tuaj yeem tso tawm ntau qhov kub thiab cov pa roj hydrogen thiab hydrogen sulfide uas yooj yim hlawv, ua rau kub hnyiab heev. Kev kov nrog cov tshuaj oxidizing, me ntsis dej, lossis kev nqus cov dej noo uas tsim cov cua sov tuaj yeem ua rau muaj pa luam yeeb daj, kub hnyiab, lossis txawm tias tawg.
Peb muab peb cov khoom siv raw sodium dithionite kom ntseeg tau tias kev xa khoom ruaj khov los ntawm qhov chaw, yam tsis txhawj txog lub sijhawm xa khoom. Nyem qhov no kom tau txais cov nqi sib tw.