硫化鈉方程式

2Na+S==Na2S，條件：研磨或者加熱.

3 S + 6 NaOH = 2 Na2S + Na2SO3 + 3 H2O 條件：加熱

2Na2S+O2=2Na2O+2S Na2S+Cl2=2NaCl+S↓

Na2S+2H2O=通電=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