Составить уравнения реакций к следующим превращениям:
а) FeS-H2S-K2S-PbS
b) S-H2S-Na2S-PbS
а)1.FeS+H2=H2S+Fe
2.H2S + 2KOH = K2S+2H2O
3.K2S + PbCl2 = PbS + 2KCl
б)1.S + H2 = H2S
2.H2S + 2NaOH = Na2S + 2H2O
3.Na2S + PbCl2 = PbS +2NaCl
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Answers & Comments
а)1.FeS+H2=H2S+Fe
2.H2S + 2KOH = K2S+2H2O
3.K2S + PbCl2 = PbS + 2KCl
б)1.S + H2 = H2S
2.H2S + 2NaOH = Na2S + 2H2O
3.Na2S + PbCl2 = PbS +2NaCl