Kev piav qhia

▶ Sodium acetate (CH3COONa) yog sodium ntsev ntawm acetic acid.Nws zoo nkaus li tsis muaj xim deliquescent ntsev nrog ntau yam kev siv.Hauv kev lag luam, nws tuaj yeem siv rau hauv kev lag luam textile rau neutralize sulfuric acid khib nyiab kwj thiab raws li photoresist thaum siv aniline dyes.Hauv kev lag luam pob zeb, nws tuaj yeem siv los ua cov pob zeb sib khi los txo cov dej puas tsuaj.Hauv cov khoom noj, nws tuaj yeem siv los ua seasoning.Nws kuj tseem siv tau los ua cov tshuaj tsis nyob hauv chav kuaj.Tsis tas li ntawd, nws kuj yog siv rau hauv cov khoom siv cua sov, tes ua kom sov thiab dej khov kub.Rau kev sim siv, nws tuaj yeem tsim los ntawm cov tshuaj tiv thaiv ntawm acetate nrog sodium carbonate, sodium bicarbonate thiab sodium hydroxide.Hauv kev lag luam, nws tau npaj los ntawm glacial acetic acid thiab sodium hydroxide.

▶ Chemical Properties

Anhydrous ntsev yog cov xim tsis muaj xim crystalline;ceev 1.528 g / cm3;melts ntawm 324 ° C;soluble heev nyob rau hauv dej;moderately soluble nyob rau hauv ethanol.Cov xim tsis muaj kob crystalline trihydrate muaj qhov ntom ntom 1.45 g / cm3;decomposes ntawm 58 ° C;yog heev soluble nyob rau hauv dej;pH ntawm 0.1M aqueous tov yog 8.9;me ntsis soluble hauv ethanol, 5.3 g / 100mL.

▶ Cia thiab Thauj

Nws yuav tsum tau muab khaws cia rau hauv qhov chaw qhuav thiab qhov cua, khaws cia kom deb ntawm tshav kub thiab noo noo thaum lub sijhawm thauj mus los, tshem tawm nrog kev saib xyuas kom tsis txhob muaj kev puas tsuaj.Tsis tas li ntawd, nws yuav tsum tau muab cais tawm ntawm cov tshuaj lom.

Daim ntawv thov

▶ Kev lag luam
Sodium acetate yog siv nyob rau hauv kev lag luam textile rau neutralize sulfuric acid khib nyiab kwj thiab kuj yog ib tug photoresist thaum siv aniline dyes.Nws tseem yog tus neeg sawv cev ntawm cov khoom siv hauv chrome tanning thiab pab tiv thaiv vulcanization ntawm chloroprene hauv cov roj hmab hluavtaws.Hauv kev ua paj rwb rau cov paj rwb pov tseg, sodium acetate yog siv los tshem tawm cov hluav taws xob zoo li qub.Nws kuj yog siv los ua "kub-ice" hauv tes sov.

▶ Lub neej ntev
Sodium acetate yog siv los txo cov dej puas tsuaj rau pob zeb los ntawm kev ua lub pob zeb ua ke, thaum tseem ua ib puag ncig zoo thiab pheej yig dua li cov epoxy feem ntau siv rau kev sib khi pob zeb tiv thaiv dej permeation.
▶ Kev daws teeb meem
Raws li lub hauv paus conjugate ntawm acetic acid, ib qho kev daws ntawm sodium acetate thiab acetic acid tuaj yeem ua raws li qhov tsis tuaj yeem khaws cov qib pH tsis tu ncua.Qhov no yog qhov tseem ceeb tshwj xeeb tshaj yog nyob rau hauv biochemical daim ntaub ntawv uas cov tshuaj tiv thaiv yog pH-nyob rau hauv ib tug me ntsis acidic ntau yam (pH 4-6).Nws kuj yog siv rau hauv cov neeg siv khoom HEATING PADS lossis tes sov so thiab tseem siv rau hauv cov dej khov kub.Sodium acetate trihydrate crystals yaj ntawm 58 ° C, yaj hauv lawv cov dej ntawm crystallization.Thaum lawv tau rhuab mus rau ib ncig ntawm 100 ° C, thiab tom qab ntawd tso cai rau txias, cov kua aqueous yuav supersaturated.Qhov kev daws teeb meem no muaj peev xwm ua kom txias txias rau chav tsev kub yam tsis muaj cov khoom siv lead ua.Los ntawm txhaj rau ntawm cov hlau disc hauv lub tshuab cua sov, lub chaw nucleation yog tsim uas ua rau cov tshuaj crystallize rau hauv cov khoom trihydrate crystals dua.Cov txheej txheem sib sau ua ke ntawm crystallization yog exothermic, yog li cov cua sov tawm.Lub latent cua sov ntawm fusion yog hais txog 264-289 kJ / kg.