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\(\left(1\right)2Fe+3Cl_2\rightarrow2FeCl_3\)
\(\left(2\right)FeCl3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)
\(\left(3\right)2Fe\left(OH\right)_3-^{t^o}\rightarrow Fe2O3+3H_2O\)
\(\left(4\right)Fe_2O_3+3H_2-^{t^o}\rightarrow2Fe+3H_2O\)
1) 2Fe + 3Cl2 -> 2FeCl3
2) FeCl3 + 3NaOH -> 3NaCl + Fe(OH)3
3) 2Fe(OH)3 -to-> Fe2O3 + 3H2O
4) Fe2O3 + 3CO -to->2 Fe + 3CO2
a) 4Al+3O2--->2Al2O3
Al2O3+6HCl--->2AlCl3+3H2O
2AlCl3+ 3H2SO4--->Al2(SO4)3+6HCl
Al2(SO4)3+6NaOH----> 2Al(OH)3+3Na2SO4
b) FeCl2+2 NaOH--->Fe(OH)2+2NaCl
Fe(OH)2---->FeO+H2O
FeO+H2-->Fe+H2O
Fe+Cl2---->FeCl2
2FeCl2+Cl2--->2FeCl3
FeCl3+3NaOH--->Fe(OH)3+3NaOH
2Fe(OH)3---->Fe2O3+3H2O
Fe2(SO4)3+3HNO3---->Fe(NO3)3+3H2SO4
a) 1. Fe + 2HCl -> FeCl2 + H2
2. FeCl2 + Ba(OH)2 ->Fe(OH)2 +BaCl2
3. Fe(OH)2 + H2SO4 -> FeSO4 + 2H2O
4. FeSO4 + BaCl2 -> FeCl2 + BaSO4
b) 1. 2Fe + 3Cl2 -> 2FeCl3 (đk: to > 250oC)
2. 2FeCl3+ 3Ba(OH)2 -> 2Fe(OH)3 + 3BaCl2
3. 2Fe(OH)3 -> Fe2O3 + 3H2O (đk: to)
4. Fe2O3 + 3H2 -> 2Fe + 3H2O
b)
(1) 2Fe +6 HCl -> 2FeCl3 + 3H2\(\uparrow\)
(2) 2FeCl3 + 3Ba(OH)2 -> 2Fe(OH)3 + 3BaCl2
(3) 2Fe(OH)3 -> Fe2O3 +3 H2O ( pứ cần to)
(42 Fe2O3 + 6H2 ->2 Fe + 3H2O
\(\left(1\right)FeSO_4+Mg\) \(\rightarrow\) \(MgSO_4+Fe\)
\(\left(2\right)3Fe+2O_2\)\(\rightarrow\) \(Fe_3O_4\)
\(\left(3\right)Fe_3O_4+4H_2\)\(\rightarrow\)\(3Fe+4H_2O\)
\(\left(4\right)2Fe+3Cl_2\)\(\rightarrow\)\(2FeCl_3\)
3FeSO4 + 2Al \(\rightarrow\) Al2(SO4)3 + 3Fe
3Fe + 2O2 \(\underrightarrow{to}\) Fe3O4
Fe3O4 + 4CO \(\underrightarrow{to}\) 3Fe + 4CO2
2Fe + 3Cl2 \(\rightarrow\) 2FeCl3
a.
2Al +3 H2SO4=> Al2(SO4)3 + 3H2
Al2(SO4)3 + 6NaOH=> 3Na2SO4 + 2Al(OH)3
Al(OH)3 + 3HCl=> AlCl3 + 3H2O
b.
2fe + 3Cl2=>2 FeCl3
FeCl3 +3 NaOH=> 3NaCl + Fe(OH)3
2Fe(OH)3 => Fe2O3 + 3H2O
Fe2O3 + 6HCl=> 2FeCl3 + 3H2O
c.
CaCO3 => CaO + CO2
CaO + H2O=> Ca(OH)2
Ca(OH)2 + 2HCl=> CaCl2 + 2H2O
CaCl2 + 2AgNO3 => 2AgCl+ Ca(NO3)2
Gửi bạn nhé :
\(1.\text{3Ba(NO3)2 + Fe2(SO4)3 → 2Fe(NO3)3 + 3BaSO4}\)
\(2.\text{3Ba(OH)2 + 2Fe(NO3)3 → 3Ba(NO3)2 + 2Fe(OH)3}\)
\(3.\text{2Fe(OH)3 → Fe2O3 + 3H2O}\)
\(4.\text{Fe2O3 + 3H2 → 2Fe + 3H2O}\)
Fe2(SO4)3+3Ba(NO3)2---->63aSO4+2Fe(NO3)3
Fe(NO3)3+3NaOH--->Fe(OH)3+3NaNO3
2Fe(OH)3--->Fe2O3+3H2O
Fe2O3+H2--->2Fe+3H2O
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
Fe + HCl - > Fecl2 + H2
2FeCl2 + NaClO + 4NaOH + H2O -> 5NaCl + 2Fe(OH)3
2Fe(OH)3 -^t0-> Fe2o3 + 3H2O
Fe2O3 + 3H2 -t0-> 2Fe + 3H2O
* cái đâu tiên là \(FeCl_3\) không phải \(FeCl_2\)
\(Fe+Cl-->FeCl_3\)
\(FeCl_3+3NaOH-->Fe\left(OH\right)_3+3NaCl\)
\(2Fe\left(OH\right)_3-->Fe_2O_3+3H_2O\)
\(2Fe\left(OH\right)_3-->Fe_2O_3+3H_2O\)