Fes-so2-nahso3-nano3-o2-so2-ca (hso3)2

Question

Fes-so2-nahso3-nano3-o2-so2-ca (hso3)2

Answer 1

4FeS + 7O2 -> 2Fe2O3 + 4SO2
SO2 + NaOH -> NaHSO3
NaHSO3 + HNO3 -> NaNO3 + SO2 + H2O
2NaNO3 -> O2 + 2NaNO2
S + O2 -> SO2
2SO2 + Ca(OH)2 -> Ca(HSO3)2