Question

1. FeS2 -> SO2 -> SO3 -> H2SO4 -> CuSO4 -> Cu -> CuCl2 -> Cu ( NO3)2

Answer 1

2FeS₂ + \(\frac{11}{2}\)O₂ -> Fe₂O₃ + 4SO₂

2SO₂ + O₂ -> 2SO₃

SO₃ + H₂O -> H₂SO₄

2H₂SO_{4 (đặc , nóng )} + Cu -> CuSO₄ + SO₂ + 2H₂O

CuSO₄ + Mg -> MgSO₄ + Cu

Cu + Cl₂ -> CuCl₂

CuCl₂ + 2AgNO₃ -> 2AgCl \(\downarrow\) + Cu(NO₃ )₂

Answer 2

4FeS2+11O2--->8SO2+2Fe2O3

2SO3+O2--->2SO3

SO3+H2O--->H2SO4

H2SO4+CuO---->CuSO4+H2O

CuSO4+Fe---->FeSO4+Cu

Cu+2AgCl---->CuCl2+2Ag

CuCl2+ 2AgNO3--->Cu(NO3)2+2AgCl

Answer 3

\(1.\text{4Fe(S2)+11O2=8SO2+2Fe2O3}\)

\(2.\text{O2 + 2SO2 ↔ 2SO3}\)

\(3.\text{SO3+H2O(lạnh)=H2SO4}\)

\(4.\text{Cu + 2H2SO4 → 2H2O + SO2 + CuSO4}\)

\(5.\text{Fe + CuSO4 → Cu + FeSO4}\)

\(6.\text{Cl2 + Cu → CuCl2}\)

\(7.\text{Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2}\)

Answer 4

https://i.imgur.com/bSPNv24.jpg