NaOH laknak in Sodium Hydrosulfide chuahnak
A hlan lio NaOH laknak lam
NaHS sodium hydrosulfide tlawmtam a phanh tikah 70%, dihydrate tlawmpal a ser.
A niam deuhmi ah cun, ti bantuk trihydrate bantuk in a um.
Tuahtawnning:
L 1 L pathum-necked round-bottom flask cu stirrer le reflux condenser (CaCl2 drying tube he aa pehtlaimi) he aa tlum.
Flask cu a ro cangmi nitrogen in an thianh, cun 200 mL (3.4 mol) ti um lomi ethanol.
12 g (0.522 mol) a thiangmi sodium thir cu a tlawmte in cawh le a dih tiang a cawh tthan.
Ti chung ah gas luhternak hri pakhat an khumh, cun a ro cangmi H2S (P2O5 cung ah a ro cangmi) cu 5-10 bubbles/sec in 2 h chung cawh in a cawh.
A lum hnu ah, NaHS sodium hydrosulfide kha tling tein a chuahter khawh nakhnga 750 mL ti a ngei lomi ether kha an cawh.
Riantuannak:
Cawhmi cu ti a luh khawh lonak hnga rang tein an thlet (coarse frit).
A fekmi cu ti um lomi ether in 3× an tawl, cun suimilam zeimawzat chung vacuum desiccator (CaCl2) ah an roter.
A chuakmi: 29.4 g ≥98% NaHS thianghlim.