Question

Viết các phương trình phản ứng để thực hiện dãy chuyển hóa sau:

a) FeS₂ -> SO₂ -> SO₃ -> H₂SO_4.

b) Na -> NaOH -> Na₂SO₄ -> NaOH -> Na₂CO₃ -> NaCl -> NaNO₃

c) Al -> Al₂O₃ -> Al₂(SO₄)₃ -> Al(OH)₃ -> NaAlO₂ -> Al(OH)₃ -> AlCl₃ -> Al(NO₃)₃

Answer 1

2FeS2+6O2-->Fe2O3+4SO2

2SO2+O2-->2SO3(V2O5,to)

SO3+H2O-->H2SO4

b)2Na+2H2O-->2NaOH+H2

2NaOH+H2SO4-->Na2SO4+2H2O

Na2SO4+Ba(OH)2-->BaSO4+2NaOH

2NaOH+CO2-->Na2CO3+H2O

Na2CO3+2HCl-->2NaCl+H2O+CO2

NaCl+AgNO3-->NaNO3+AgCl

C)

4Al+3O2-->2AL2O3

Al2O3+3H2SO4-->Al2(SO4)3+3H2O

Al2(SO4)3+3Ba(OH)2-->3BaSO4+2Al(OH)3

Al(OH)3+NaOH-->NaAlO2+H2O

NaALO2+H2O+CO2-->Al(OH)3+NaHCO3

Al(OH)3+HCl-->AlCl3+H2O

AlCl3+AgNO3-->Al(NO3)3+AgCl

Answer 2

a) 2FeS2 +11/2O2-----> 4SO2 +Fe2O3

2SO2+O2------> 2SO3

SO3+H2O----- -> H2SO4.

b) 2Na +2H2O-----> 2NaOH+H2

2NaOH+H2SO4----> Na2SO4 +2H2O

Na2SO4+Ba(OH)2----> NaOH +BaSO4

2NaOH+CO2----> Na2CO3+H2O

Na2CO3+2HCl----> 2NaCl+H2O+CO2

NaCl+AgNO3--->NaNO3+AgCl

c) 4Al+3O2--- -> 2Al2O3

Al2O3+3H2SO4 -> Al2(SO4)3+3H2O

Al2(SO4)3+6NaOH-> 2Al(OH)3+3Na2SO4

Al(OH)2+NaOH ----> NaAlO2+2H2O

NaAlO2+2H2O+CO2----> Al(OH)3 +NaHCO3

Al(OH)3+3NaOH----> AlCl3+3NaOH

Alcl3+3AgNO3---> Al(NO3)3+3NaCl