Sodium sulphide

Sulfide yog sodium (sodium sulphide kev) yog ib tug compound uas yog dav siv nyob rau hauv kev lag luam. Yog li, qhov no yam khoom uas yog siv metallurgy, tshuaj, lub teeb kev lag luam thiab lwm yam lag luam. Sodium sulphide, nyob rau hauv particular, siv nyob rau hauv qhov siv thiab ua sis plawv hniav, dyes, nyob rau hauv kev ntawm cov tawv. Yam khoom uas yog siv nyob rau hauv lub melting ntawm ib co neeg uas tsis yog-ferrous hlau. Sodium sulfide yog indispensable nyob rau hauv lub teb ntawm analytical Science News for KIDS. Nws yog siv raws li ib tug reagent nyob rau hauv ntau yam dab.

Sodium sulphide. Formula (Na2S)

Lub cev lub xeev ntawm teeb meem yog suav tias yog homogeneous loj, nyob rau lub high-rhiab heev, los yog hygroscopic muaju. Cov tshuaj yeeb dej caw ua nyob rau hauv daim ntawv ntawm ib tug monolith 3 qhov tseem ceeb nyob rau hauv particulate daim ntawv (nyob rau hauv daim ntawv ntawm cov plaub ya ri los yog granules). Thov tso cai khoom muaj teeb-xim av, daj daj los yog grayish xim. Ntau khaus los yog lwm yam xim qhia tseem ceeb oxidation agents. Tej sodium sulfide thiab loses pab tau zog unsuitable rau kev siv tswv yim. Cov kev hom phiaj khoom no muaj cov los ntawm rau caum peb mus rau rau caum-xya feem pua ntawm lub hauv paus cov ntaub ntawv uas nyob rau hauv cov mob uas qhov loj feem ntawm lub insoluble residue yog tsis ntau tshaj li ib nrab feem pua.

Nyob rau hauv raws li cov kev faib ntawm cov theem ntawm kev txaus ntshai rau tib neeg Sodium sulfurous muab rau lub thib ob chav kawm ntawv. Cov tshuaj yeeb dej caw yog inflammable thiab heev. Nyob rau hauv no kev twb kev txuas, nws yog preferable los khaws cov ntaub ntawv uas nyob rau hauv kaw chav uas yog nruab nrog tas nrho cov chaw yuav tsum tau los xyuas kom meej hluav taws kev ruaj ntseg. Nws tsis pom zoo kom tshem tawm cov pob nrog cov khoom kom txog rau thaum qhov ncaj daim ntawv thov ntawm cov tshuaj yeeb dej caw. Thaum tswj kev ncaj ncees ntawm ntim sodium sulfide yuav khaws cia rau txog li ob lub xyoo. Term zoo siv nyob rau hauv cov ntaub ntawv no tsuas yog ib lub xyoo.

Tsheb thauj mus los ntawm cov khoom yuav tsum tau nqa tawm los ntawm kev txhais tau tias kev thauj nyob rau hauv kaw wagons los yog ntim. Ntau mloog yuav tsum tau them mus rau lub chaw thau khoom thiab unloading cov khoom, tshwj xeeb tshaj yog yog hais tias nws yog lam xav tso nyiaj ncaj qha kev sib cuag nrog cov khoom, fej nyob rau hauv saj zawg zog ntim. Thaum lub sij hawm thauj mus los tsis txhob mus ib ntus cia nyob rau hauv qhib chaw los yog depots, tsis zoo nruab ua li no.

Kev sodium sulfide Suav ntau lawm yog tau ntim rau hauv tshwj xeeb lub hnab rau nees nkaum-tsib kilograms. Ntim muab kev tiv thaiv los ntawm ntxov ntxov oxidation thiab raug mus rau lub teeb. Tsis tas li ntawd, raws li ib tug ntim steel drums yog siv heev dua lwm yam rau tshuaj lom neeg khoom, lub ntim (CK-1-5 (7)), los yog raws li mos ntim rau ib siv. Cov tshuaj yeeb dej caw yuav fej nyob rau hauv daim ntawv hnab (four- los yog tsib-txheej) nrog ib tug puab liner - polyethylene hnab. Lub hnab yuav tsum tau lub net luj yog tsis ntau tshaj li tsib caug kilograms.

Uas nyob rau hauv tshwj xeeb ntim yam khoom uas yog thauj mus rau lub dov Tshuag qhib hom.

Khoom ceev 1,856 gram ib nyhav centimeter. Melting kub nce mus txog 1180 degrees. Cov khoom no mas hygroscopic. Nyob rau hauv dej ntawm nees nkaum degrees yaj 13.6% ntawm 97,5 degrees - 45% ntawm cov khoom. Cov khoom no muaj peev xwm sawv ntawm txoj kev crystalline hydrates. Rau aqueous lub ntsiab ntawm sodium sulfide kev yam ntxwv alkaline cov tshuaj tiv thaiv.

Lub hydrolysis yog nqa tawm nrog sodium sulphide raws li cov ntsev uas yog tsim nyob rau ib tsis muaj zog acid thiab ib tug muaj zog paus. Phenolphtalein nyob rau hauv ib txoj kev kuaj raj nrog ib tug daws yuav liab. Qhov no qhia tau hais tias lub alkaline nruab nrab yog tsim nyob rau hauv lub xeem raj. Yog li, sodium sulfide, raws li zoo li lwm yam ntsev uas yog tsim nyob rau ib tsis muaj zog acid thiab ib tug muaj zog puag, hydrolysed tsim raws li ib tug tshwm sim ntawm alkali.