2Na+S==Na2S,条件:研磨或者加热。
3 S + 6 NaOH = 2 Na2S + Na2SO3 + 3 H2O 条件:加热
2Na2S+O2=2Na2O+2S
Na2S+Cl2=2NaCl+S↓
Na2S+2H2O=通电=S↓+H2↑+2NaOH
Na2S+H2O=NaOH+NaHS 可逆
NAHS+ H2O= NAOH + H2+ + S2-
S2- + H2O = HS- + OH- 可逆
HS- + H2O=H2S + OH- 可逆
4Na2S+O2+2H2O==2Na2S2+4NaOH
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