nkhani

1. Njira yoyamwitsa:
Yatsani mpweya wa hydrogen sulfide ndi alkali sulfide solution (kapena caustic soda solution). Chifukwa mpweya wa hydrogen sulfide ndi wapoizoni, kuyamwa kwake kuyenera kuchitika pansi pazovuta. Pofuna kupewa kuipitsidwa kwakukulu kwa mpweya ndi hydrogen sulfide mu mpweya wotulutsa mpweya, zotsekemera zingapo zimagwiritsidwa ntchito motsatizana popanga, ndipo hydrogen sulfide yokhutira imachepetsedwa kukhala yotsika pambuyo poyamwa mobwerezabwereza. The mayamwidwe madzi anaikira kupeza sodium hydrosulfide. Chemical formula:
H2S+NaOH→NaHS+H2O
H2S+Na2S→2NaHS

2. Sodium alkoxide imakumana ndi hydrogen sulfide youma kupanga sodium hydrosulfide:
Mu botolo la 150mL ndi chitoliro cha nthambi, onjezerani 20mL wa ethanol watsopano wosungunuka ndi 2g wa zidutswa zachitsulo za sodium zosalala komanso zosanjikiza za oxide, ikani reflux condenser ndi chitoliro chowumitsa pa botolo, ndikusindikiza chitoliro cha nthambi kaye. Pamene sodium alkoxide yayamba, onjezerani pafupifupi 40 ml ya ethanol mtheradi mumagulu mpaka sodium alkoxide itasungunuka kwathunthu.
Ikani chubu lagalasi molunjika m'munsi mwa yankho kudzera mu chitoliro cha nthambi, ndikudutsa mpweya wouma wa hydrogen sulfide (zindikirani kuti palibe mpweya womwe ungalowe mu botolo mu chitoliro cha nthambi chomata). Khutsani yankho. Yankho anali kuyamwa osefedwa kuchotsa mpweya. Sefayi idasungidwa mu botolo lowuma la conical, ndipo 50 mL ya ether yamtheradi idawonjezedwa, ndipo kuchuluka kwa NaHS white precipitate kudayamba nthawi yomweyo. Pafupifupi 110 mL ya ether imafunika. Madziwo adasefedwa mwachangu, kutsukidwa nthawi 2-3 ndi ether mtheradi, kufufutidwa, ndikuyikidwa mu vacuum desiccator. Kuyera kwa mankhwalawa kumatha kufikira chiyero chosanthula. Ngati chiyero chapamwamba cha NaHS chikufunika, chimatha kusungunuka mu ethanol ndikupangidwanso ndi ether.

3.Sodium hydrosulfide madzi:
Sungunulani sodium sulfide nonahydrate mu mwatsopano nthunzi stuffing madzi, ndiyeno kuchepetsa 13% Na2S (W/V) njira. 14 g wa sodium bicarbonate anawonjezedwa kwa pamwamba njira (100 mL) ndi oyambitsa ndi pansi 20 ° C, yomweyo Kutha ndi exothermic. Pambuyo pake 100 ml ya methanol anawonjezeredwa ndi kusonkhezera ndi pansi pa 20 ° C. Panthawiyi mpweya wotulutsa mpweya unalinso wotentha kwambiri ndipo pafupifupi mpweya wonse wa crystalline sodium carbonate unatuluka nthawi yomweyo. Pambuyo pa mphindi 0, kusakaniza kumasefedwa ndi kuyamwa ndipo zotsalirazo zidatsukidwa ndi methanol (50 ml) m'magawo. Sefayi inali yosachepera 9 g ya sodium hydrosulfide komanso osapitilira 0,6 peresenti ya sodium carbonate. Miyezo ya awiriwa ndi pafupifupi 3.5 magalamu ndi 0,2 magalamu pa 100 ml ya yankho, motsatana.

Nthawi zambiri timakonzekera mwa kuyamwa hydrogen sulfide ndi sodium hydroxide solution. Pamene okhutira (misa gawo la sodium hydrosulfide) ndi 70%, ndi dihydrate ndi mu mawonekedwe a flakes; ngati zili m'munsi, ndi mankhwala amadzimadzi, ndi atatu Hydrate.