NaOH Absorption hmanga Sodium Hydrosulfide siam chhuah
NaOH Absorption Method hmanlai tak a ni
NaHS sodium hydrosulfide concentration a thlen chuan 70% a ni., dihydrate flakes a siam thin.
Concentration hniam zawkah chuan liquid trihydrate angin a awm thin.
Zawm tur:
1 L three-necked round-bottom flask ah hian stirrer leh reflux condenser (CaCl2 drying tube nena inzawm) dah a ni.
Flask chu dry nitrogen hmangin an purge a, chutah chuan charge a ni 200 mL (3.4 mol) tui awm lo ethanol a ni.
Sodium metal thianghlim 12 g (0.522 mol) chu stirring hnuaiah a te tein dahin a hmin vek thlengin reflux a ni.
Gas inlet tube chu liquid chhungah dahin, dry H2S (P2O5-a vawt) chu 5–10 bubbles/sec-in 2 h chhung stirring hnuaiah bubbled a ni.
A lum hnuah 750 mL anhydrous ether dahin NaHS sodium hydrosulfide chu a precipitate vek a ni.
Hnathawh dan tur:
Chu mixture chu rang takin filter (coarse frit) a ni a, chu chuan moisture absorption a veng thei a ni.
Solid chu anhydrous ether hmangin 3× a silfai a, chutah chuan vacuum desiccator (CaCl2)-ah darkar engemaw zat a vawt a.
A thar chhuah: ≥98% NaHS thianghlim 29.4 g.