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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
Bạn tự cân bằng các phương trình nhé
Fe+Cl2->FeCl3(đk nhiệt độ)
FeCl3+NaOH->NaCl+Fe(OH)3
Fe(OH)3+H2SO4->Fe2(SO4)3+H2O
Fe(OH)3->Fe2O3+H2O(điều kiện nhiệt độ)
Fe2O3+CO(dư)->Fe+CO2(đk nhiệt độ)
b)Al+Cl2->AlCl3
AlCl3+NaOH(vừa đủ)->Al(OH)3+NaCl
Al(OH)3+H2SO4->Al2(SO4)3+H2O
Al(OH)3->Al2O3+H2O(đk nhiệt độ)
Al2O3->Al+O2(điện phân nóng chảy criolit)
S+O2->SO2(đk nhiệt độ)
SO2+Br2+H2O->H2SO4+HBr
H2SO4+BaO->BaSO4+H2O
H2SO4(đặc)+Cu->CuSO4+SO2+H2O
1.
Zn + H2SO4 -> ZnSO4 + H2
ZnSO4 + BaCl2 -> ZnCl2 + BaSO4
ZnCl2 + 2AgNO3 -> Zn(NO3)2 + 2AgCl
Zn(NO3)2 + Ba(OH)2 -> Zn(OH)2 + Ba(NO3)2
Zn(OH)2 \(\underrightarrow{t^o}\)ZnO + H2O
2Fe(OH)3 \(\underrightarrow{t^o}\)Fe2O3 + 3H2O
Fe2O3 +6 HCl ->2 FeCl3 + 3H2O
FeCl3 + 3AgNO3 -> Fe(NO3)3 + 3AgCl
Fe(NO3)3 + 3NaOH -> 3NaNO3 + Fe(OH)3
2Fe(OH)3 + 3H2SO4 -> Fe2(SO4)3 + 6H2O
1, Fe + 2HCl -----> FeCl2 + H2
2,Fe(OH)3 + 3HCl -----> FeCl3 + 3H2O
3,CuO + 2HCl -----> CuCl2 + H2O
4,Cu+2H2SO4(dac,nong) --->2H2O + SO2+ CuSO4
Fe + 2HCl \(\rightarrow\)FeCl2 + H2
Fe(OH)3 + 3HCl \(\rightarrow\)FeCl3 + 3H2O
CuO+2HCl\(\rightarrow\)CuCl2 + H2O
Cu + 2H2SO4 \(\rightarrow\)CuSO4 + SO2 + 2H2O
a.Fe + 2HCl-----> FeCl2 + H2
FeCl2 + 2NaOH----->Fe(OH)2 + 2NaCl
Fe(OH)2+ H2SO4---->FeSO4 + 2H2O
FeSO4 + Ba(NO3)2----->Fe(NO3)2 + BaSO4
b.4Al + 3O2---t*-->2Al2O3
Al2O3 + 6HCl------>2AlCl3 + 3H2O
AlCl3 + 3NaOH----->Al(OH)3 + 3NaCl
2Al(OH)3----t*---> Al2O3 + 3H2O
c.2Cu+ O2--t*->2CuO
CuO + 2HCl---->CuCl2 + H2O
CuCl2 + 2NaOH----->Cu(OH)2 + 2NaCl
Cu(OH)2---t*---> CuO + H2O
d.2Cu+ O2--t*->2CuO
CuO + 2HCl---->CuCl2 + H2O
CuCl2 + 2AgNO3-----> Cu(NO3)2 + 2AgCl
Cu(NO3)2 + 2NaOH-----> Cu(OH)2 + 2NaNO3
Cu(OH)2---t*--->CuO + H2O
CuO + H2---t*--> Cu + H2O
a)
\(2Ca+O_2\rightarrow2CaO\)
\(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)
\(Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\)
\(CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2\)
\(CaCl_2+2AgNO_3\rightarrow Ca\left(NO_3\right)_2+2AgCl\downarrow\)
b)
\(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
\(FeCl_3+3KOH\rightarrow3KCl+Fe\left(OH\right)_3\downarrow\)
\(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)
\(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
)2Ca + O2 ------>2CaO
CaO + H2O --->Ca(OH)2
Ca(OH)2+CO2 -->CaCO3+H2OO
CaCO3+2HCl--->CaCl2+H2CO3
CaCl2+2HNO3--->Ca(NO3)2+2HCl
B,tự giải nha
Fe2O3+6HCl->2FeCl3+3H2O
FeCl3+3AgNO3->3AgCl+Fe(NO3)3
Fe(NO3)3+3NaOH->Fe(OH)3+3NaNO3
2Fe(OH)3->Fe2O3+3H2O
(1) Fe2O3 + 6HCl ->2 FeCl3 +3 H2O
(2) FeCl3 + 3AgNO3 -> Fe(NO3)3 + 3AgCl\(\downarrow\)
(3) Fe(NO3)3 + 3NaOH -> 3NaNO3 + Fe(OH)3 \(\downarrow\)
(4) 2Fe(OH)3 \(^{to}\rightarrow\)Fe2O3 + 3H2O
1)
\(2Fe\left(OH\right)_3\) -> \(Fe_2O_3\) + \(3H_2O\)
\(Fe_2O_3\) + \(3CO\) -> \(2Fe\) + \(3CO_2\)
\(2Fe+3Cl_2\) -> \(2FeCl_3\)
\(FeCl_3+3AgNO_3\) -> \(3AgCl\) +\(Fe\left(NO_3\right)_3\)
2)
\(4FeS+7O_2\) -> \(2Fe_2O_3+4SO_2\)
\(Fe_2O_3+3CO\) -> \(2Fe+3CO_2\)
\(2Fe+3Cl\) ->\(2FeCl_3\)
\(2FeCl_3+3Ba\left(OH\right)_2\)->\(3BaCl_2+2Fe\left(OH\right)_3\)
3)
\(2Fe+3Cl_2\) -> \(2FeCl_3\)
\(2FeCl_3+3Ba\left(OH\right)_2\) -> \(3BaCl_2+2Fe\left(OH\right)_3\)
\(2Fe\left(OH\right)_3\) -> \(Fe_2O_3+3H_2O\)
\(Fe_2O_3+3CO\) -> \(2Fe+3CO_2\)
4)
\(2Cu+O_2\) -> \(2CuO\)
\(CuO+2HCl\) -> \(CuCl_2+2H_2O\)
\(CuCl_2+2NaOH\) -> \(2NaCl_2+Cu\left(OH\right)_2\)
\(Cu\left(OH\right)_2+H_2SO_4\) -> \(2H_2O+CuSO_4\)