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![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 3 :
4FeS + 7O2 --t--> 2Fe2O3 + 4SO2
Fe2O3 + 6HNO3 -> 2Fe(NO3)3 + 3H2O
Fe(NO3)3 + 3 NaOH -> Fe(OH)3 +3NaNO3
2Fe(OH)3 --t--> Fe2O3 + 3H2O
Fe2O3 + 3H2 -t-> 2Fe + 3H2O
Fe + S -t-> FeS
1, FeCl3 + 3KOH → Fe(OH)3 + 3KCl
2Fe(OH)3 \(\underrightarrow{t^o}\)Fe2O3 + 3H2O
Fe2O3 + 3H2 \(\underrightarrow{t^o}\) 2Fe + 3H2O
3Fe + 2O2 \(\underrightarrow{t^o}\) Fe3O4
2, 2Ca + O2 \(\underrightarrow{t^o}\) 2CaO
CaO + H2O → Ca(OH)2
Ca(OH)2 + CO2 → CaCO3 + H2O
CaCO3 + H2O + CO2→ Ca(HCO3)2
Ca(HCO3)2 + 2HCl → CaCl2 + 2H2O + 2CO2
CaCl2 + Ca(OH)2 → 2CaO + 2HCl
3, 4FeS + 7O2 \(\underrightarrow{t^o}\) 2Fe2O3 + 4SO2
Fe2O3 + 6HNO3 → 2Fe(NO3)3 + 3H2O
Fe(NO3)3 + 3KOH → Fe(OH)3 + 3KNO3
2Fe(OH)3 \(\underrightarrow{t^o}\) Fe2O3 + 3H2O
Fe2O3 + 3H2 \(\underrightarrow{t^o}\) 2Fe + 3H2O
Fe + S \(\underrightarrow{t^o}\) FeS
![](https://rs.olm.vn/images/avt/0.png?1311)
a) SO2 + Na2O -> Na2SO3
Na2SO3 + H2SO4 -> Na2SO4 + SO2 + H2O
Na2SO4 + Ba(OH)2 -> BaSO4 \(\downarrow\)+ 2NaOH
2NaOH + CO2 -> Na2CO3 + H2O
b) CaO + CO2 -> CaCO3
CaCO3 \(\rightarrow^{t^o}\) CaO + CO2
CaO + H2O -> Ca ( OH)2
Ca ( OH)2 + CO2 -> CaCO3 + H2O
CaCO3 + H2SO4 -> CaSO4 + CO2 + H2O
c) 2Fe + 3Cl2 \(\rightarrow^{t^o}\) 2FeCl3
FeCl3 + 3NaOH -> Fe(OH)3 \(\downarrow\) + 3NaCl
2Fe(OH)3 \(\rightarrow^{t^o}\) Fe2O3 + 3H2O
Fe2O3 + 3H2SO4 -> Fe2(SO4)3 + 3H2O
Fe2(SO4)3 + 3BaCl2 -> 2FeCl3 + 3BaSO4\(\downarrow\)
d) Fe + 2HCl -> FeCl2 + H2
FeCl2 + 2AgNO3 -> 2AgCl\(\downarrow\) + Fe(NO3)2
Fe(NO3)2 + 2NaOH -> Fe(OH)2\(\downarrow\) + 2NaNO3
Fe(OH)2 + H2SO4 -> FeSO4 + 2H2O
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,\\ \left(1\right)Fe+Cu\left(NO_3\right)_2\rightarrow Fe\left(NO_3\right)_2+Cu\\ \left(2\right)Fe\left(NO_3\right)_2+2KOH\rightarrow Fe\left(OH\right)_2\downarrow+2KNO_3\\ \left(3\right)Fe\left(OH\right)_2+2HCl\rightarrow FeCl_2+2H_2O\)
\(\left(4\right)FeCl_2\) \(\rightarrow\left(đpdd\right)\) \(Fe+Cl_2\)
\(b,\\ \left(1\right)2Fe+3Cl_2\rightarrow\left(t^o\right)2FeCl_3\\ \left(2\right)FeCl_3+3AgNO_3\rightarrow Fe\left(NO_3\right)_3+3AgCl\downarrow\\ \left(3\right)Fe\left(NO_3\right)_3+3KOH\rightarrow Fe\left(OH\right)_3+3KNO_3\\ \left(4\right)2Fe\left(OH\right)_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a. Al2O3+ 3H2SO4 ---> Al2(SO4)3 + 3H2O
b. 2Fe(NO3)3 + 3Ba(OH)2 --->2Fe(OH)3 + 3Ba(NO3)2
c. 3Ca(NO3)2 + 2K3PO4 ---> Ca3(PO4)2 + 6KNO3
d. Ca(HCO3)2 + 2HCl ---> CaCl2 + 2CO2 + 2H2O
a, Al2O3+3H2SO4--->Al2(SO4)3+3H2O
b, 2Fe(NO3)3+3Ba(OH)2--->2Fe(OH)3+3Ba(NO3)2
c, 3Ca(NO3)2+2K3PO4--->Ca3(PO4)2+6KNO3
d, Ca(HCO3)2+2HCl--->CaCl2+2CO2+2H2O
![](https://rs.olm.vn/images/avt/0.png?1311)
\(C+O_2\underrightarrow{t^o}CO_2\)
\(CO_2+CaO\rightarrow CaCO_3\)
\(CaCO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O\)
\(CaCl_2+2AgNO_3\rightarrow Ca\left(NO_3\right)_2+2AgCl_{\downarrow}\)
Bạn tham khảo nhé!
\(C+O_2\underrightarrow{t^0}CO_2\)
\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)
\(CaCO_3+2HCl\rightarrow H_2O+CO_2+CaCl_2\)
\(CaCl_2+2AgNO_3\rightarrow2AgCl+Ca\left(NO_3\right)_2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(1\\ 2Al\left(OH\right)_3\rightarrow\left(t^o\right)Al_2O_3+3H_2O\\ 2\\ Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\\ Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow3BaSO_4+2AlCl_3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1
1)4 Al+3O2→2Al2O3
(2)Al2O3+6HCl→2AlCl3+3H2O
(3)AlCl3+3NaOH→Al(OH)3+3NaCl
2
4Al+3O2→2Al2O3
Al2O3+6HCl→2AlCl3+3H2O
AlCl3+3NaOH→Al(OH)3+3NaCl
3
Fe+H2SO4→FeSO4+H2
(2)FeSO4+BaCl2→FeCl2+BaSO4
(3)FeCl2+2NaOH→Fe(OH)2+2NaCl
(4)Fe(OH)2→FeO+H2O
4
Fe+H2SO4→FeSO4+H2
FeSO4+BaCl2→FeCl2+BaSO4
FeCl2+2NaOH→Fe(OH)2+2NaCl
Fe(OH)2→FeO+H2O
5
Fe+2HCl→FeCl2+H2
(2)FeCl2+2AgNO3→Fe(NO3)2+2AgCl
(3)Fe(NO3)2+2NaOH→Fe(OH)2+2NaNO3
(4)Fe(OH)2+MgSO4→FeSO4+Mg(OH)2
Câu 1 :
( 1 ) 4Al + 3O2 → 2Al2O3 ( Nhiệt độ )
( 2 ) Al2O3 + 6HCl → 2AlCl3 + 3H2O
( 3 ) AlCl3 + 3NaOH → Al(OH)3 + 3NaCl
Câu 2 :
( 1 ) 2Al + 6HCl → 2AlCl3 + 3H2
( 2 ) AlCl3 + 3NaOH → Al(OH)3 + 3NaCl
( 3 ) 2Al(OH)3 → Al2O3 + 3H2O ( Nhiệt độ )
Câu 3 :
( 1 ) Fe + H2SO4 → H2 + FeSO4
( 2 ) BaCl2 + FeSO4 → FeCl2 + BaSO4
( 3 ) FeCl2 + 2NaOH → NaCl + Fe(OH)2
( 4 ) Fe(OH)2 → FeO + H2O ( Nhiệt độ )
Câu 4 :
( 1 ) Fe(OH)2 → FeO + H2O ( Nhiệt độ )
( 2 ) FeO + H2SO4 → H2O + FeSO4
( 3 ) BaCl2 + FeSO4 → FeCl2 + BaSO4
( 4 ) FeCl2 + 2NaOH → NaCl + Fe(OH)2
Câu 5 :
( 1 ) Fe + 2HCl → FeCl2 + H2
( 2 ) 2AgNO3 + FeCl2 → 2AgCl + Fe(NO3)2
( 3 ) Fe(NO3)2 + NaOH → NaNO3 + Fe(OH)2
( 4 ) H2SO4 + Fe(OH)2 → 2H2O + FeSO4
Câu 6 :
( 1 ) 3Cl2 + 2Fe → 2FeCl3 ( Nhiệt độ )
( 2 ) 3NaOH + FeCl3 → 3NaCl + Fe(OH)3
( 3 ) 3H2SO4 + 2Fe(OH)3 → Fe2(SO4)3 + 6H2O
( 4 ) 3BaCl2 + Fe2(SO4)3 → 2FeCl3 + 3BaSO4
Câu 7 :
( 1 ) 3NaOH + Fe(NO3)3 → 3NaNO3 + Fe(OH)3
( 2 ) 2Fe(OH)3 → Fe2O3 + 3H2O ( Nhiệt độ )
( 3 ) 2Al + Fe2O3 → Al2O3 + 2Fe
( 4 ) 3Cl2 + 2Fe → 2FeCl3 ( Nhiệt độ )
Câu 8 :
( 1 ) Fe2(SO4)3 + 6NaOH → 3Na2SO4 + 2Fe(OH)3
( 2 ) 2Fe(OH)3 → Fe2O3 + 3H2O ( Nhiệt độ )
( 3 ) Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O
( 4 ) 3BaCl2 + Fe2(SO4)3 → 2FeCl3 + 3BaSO4
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(S+O2\rightarrow SO2\)
2SO2+O2---->2SO3
SO3+H2O--->H2SO4
H2SO4+Na2O---->Na2SO4+H2O
Na2SO4+BaCl2---->2NaCl+BaSO4
b) 2Ca+O2--->2CaO
CaO+H2O--->Ca(OH)2
Ca(OH)2+CO2---->CaCO3+H2O
CaCO3+H2SO4----> CaSO4+H2O+CO2
CaSO4+BaCl2--->CaCl2+BaSO4
a,
\(1.\text{O2 + S → SO2}\)
\(2.\text{O2 + 2SO2 ↔ 2SO3}\)
\(3.\text{H2O + SO3 → H2SO4}\)
\(3.\text{H2SO4 + 2NaOH → 2H2O + Na2SO4}\)
\(4.\text{BaCl2 + Na2SO4 → 2NaCl + BaSO4}\)
b,
\(1.2Ca+O2\rightarrow2CaO\)
\(2.\text{CaO + H2O → Ca(OH)2}\)
\(3.\text{Ca(OH)2 + CO2 → CaCO3 + H2O}\)
\(4.\text{CaCO3 + H2SO4 → H2O + CO2 + CaSO4}\)
\(5.\text{BaCl2 + CaSO4 → CaCl2 + BaSO4}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Fe →(1) Fe2(SO4)3 →(2) Fe(OH)3 →(3) Fe2O3 →(4) Fe(NO3)3
(1) 2Fe + 3H2SO4 → Fe2(SO4)3 + 3H2
(2) Fe2(SO4)3 + 6NaOH -> 3Na2SO4 + 2Fe(OH)3
(3) 2Fe(OH)3 →t○ Fe2O3 + 3H2O
(4) Fe2O3 + 6HNO3 -> 2Fe(NO3)3 + 3H2O
\(CaCO_3+H_2O+CO_2\rightarrow Ca\left(HCO_3\right)_2\\ Ca\left(HCO_3\right)_2+2HCl\rightarrow CaCl_2+2CO_2+2H_2O\\ CaCl_2+2AgNO_3\rightarrow Ca\left(NO_3\right)_2+2AgCl\)
bạn xen lại đề
\(2Fe\left(OH\right)_3\xrightarrow[]{t^0}Fe_2O_3+3H_2O\)
\(CaCO_3+CO_2+H_2O\rightarrow Ca\left(HCO_3\right)_2\)
\(Ca\left(HCO_3\right)_2+2HCl\rightarrow2H_2O+2CO_2+CaCl_2\)
\(CaCl_2+2HNO_3\rightarrow2HCl+Ca\left(NO_3\right)_2\)
Bạn xem lại P/ư 4 nhe.
\(2Fe\left(OH\right)_3\rightarrow\left(t^o\right)Fe_2O_3+3H_2O\)