1.Fe+S=Fes
2. 4FeS + 7O2=2Fe2O3 + 4SO2
3. Fe2O3 + 2NaOH = 2NaFeO2 + H2O
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1.Fe+S=Fes
2. 4FeS + 7O2=2Fe2O3 + 4SO2
3. Fe2O3 + 2NaOH = 2NaFeO2 + H2O