2NaOH + ZnCl2 = Zn(OH)2↓ + 2NaCl
2Na+ + 2OH- + Zn+ + 2Cl- = ZnOH2 + 2Na+ + 2Cl-
2OH- + Zn+ = ZnOH2
H2S + NaOH = NaHS + H2O
H2S + Na+ + OH− = Na+ + HS− + H2O
H2S + OH− = HS− + H2O
2NaOH + ZnCl2 = Zn(OH)2↓ + 2NaCl
2Na+ + 2OH- + Zn+ + 2Cl- = ZnOH2 + 2Na+ + 2Cl-
2OH- + Zn+ = ZnOH2
H2S + NaOH = NaHS + H2O
H2S + Na+ + OH− = Na+ + HS− + H2O
H2S + OH− = HS− + H2O