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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 \(FeCl_2\)
\(Fe+Cl-->FeCl_3\)
\(FeCl_3+3NaOH-->Fe\left(OH\right)_3+3NaCl\)
\(2Fe\left(OH\right)_3-->Fe_2O_3+3H_2O\)
\(2Fe\left(OH\right)_3-->Fe_2O_3+3H_2O\)
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
Fe2O3+6HCl--->2FeCl3+3H2O
FeCl3+3HNO3---->Fe(NO3)3+3HCl
Fe(NO3)3+ 3NaOH--->Fe(OH)3+3NaNO3
2Fe(OH)3+ 3H2SO4---->Fe2(SO4)3+6H2O
Fe2(SO4)3+3 BaCl2----->2FeCl3+3BaSO4
\(1.\text{Fe2O3 + 6HCl → 3H2O + 2FeCl3}\)
\(2.\text{3AgNO3 + FeCl3 → 3AgCl + Fe(NO3)3}\)
\(3.\text{ 3Ba(OH)2 + 2Fe(NO3)3 → 3Ba(NO3)2 + 2Fe(OH)3 (kt) }\)
\(4.\text{3H2SO4 + 2Fe(OH)3 → Fe2(SO4)3 + 6H2O}\)
\(5.\text{3BaCl2 + Fe2(SO4)3 → 2FeCl3 + 3BaSO4}\)
1.
\(2KClO_3\rightarrow2KCl+3O_2\)
\(4K+O_2\rightarrow2K_2O\)
\(K_2O+H_2O\rightarrow2KOH\)
\(2KOH+H_2SO_4\rightarrow K_2OSO_4+2H_2O\)
\(K_2SO_4+BaCl_2\rightarrow2KCl+BaSO_4\)
\(2KCl+2H_2O\rightarrow2KOH+Cl_2+H_2\)
2.
\(Cu+H_2SO_{4_{dac}}\rightarrow CuSO_4+SO_2+2H_2O\)
\(CuSO_4+BaCl_2\rightarrow CuCl_2+BaSO_4\)
\(CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\)
\(Cu\left(NO_3\right)_2+2NaOH\rightarrow NaNO_3+Cu\left(OH\right)_2\)
\(Cu\left(OH\right)_2\rightarrow CuO+H_2O\)
\(CuO+H_2\rightarrow Cu+H_2O\)
3.
\(4Al+3O_2\rightarrow2Al_2O_3\)
\(Al_2O_2+6HCl\rightarrow2AlCl_3+3H_2O\)
\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)
\(2Al\left(OH\right)_2\rightarrow Al_2O_3+H_2O\)
\(2Al_2O_3\rightarrow4Al+3O_2\)
\(2Al+2NaOH+2H_2O\rightarrow2NaAlO_2+3H_2\)
4.
\(C+O_2\rightarrow CO_2\)
\(CO_2+C\rightarrow2CO\)
\(2CO+O_2\rightarrow2CO_2\)
\(CO_2+NaOH\rightarrow NaHCO_2\)
\(NaHCO_3+NaOH\rightarrow Na_2CO_3+H_2O\)
\(Na_2CO_3+CaCl_2\rightarrow2NaCl+CaCO_3\)
\(CaCO_3\rightarrow CaO+CO_2\)
5.
\(Cl_2+H_2\rightarrow2HCl\)
\(4HCl+MnO_2\rightarrow MnCl_2+Cl_2+2H_2O\)
\(Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\)
\(2NaC+2H_2O\rightarrow2NaOH+Cl_2+H_2\)
\(Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\)
Viết PTHH biễu diễn chỗi biến hóa:
1) 2KClO3 -->2KCl+3O2
O2+4K-->2K2O
K2O+H2O-->2KOH
2KOH+H2SO4-->K2SO4+2H2O
K2SO4+BaCl2-->2KCl+BaSO4
2KCl-->Cl2+2K
2) Cu+FeSO4-->CuSO4+Fe
CuSO4+BaCl2-->CuCl2+BaSO4
CuCl2+2AgNO3-->Cu(NO3)2+2AgCl
Cu(NO3)+2NaOH-->Cu(OH)2+2NaNO3
Cu(OH)2-->CuO+H2O
2CuO-->2Cu+O2
3)4Al+3O2-->2Al2O3
Al2O3+6HCl-->2AlCl3+3H2O
2AlCl3+6NaOH-->2Al(OH)3+6NaCl
2Al(OH)3-->Al2O3+3H2O
2Al2O3-->4Al+3O2
2Al+2H2O+2NaOH-->2NaAlO2+3H2
4)C+O2-->CO2
CO2+C-->2CO
2CO+O2---->2CO2-
CO2+NaOH----->NaHCO3
2NaHCO3-->Na2CO3+H2O+CO2
Na2CO3+CaCl2-->CaCO3+2NaCl
CaCO3-->CO2+CaO
5)Cl2+H2-->2HCL
2HCl-->Cl2+H2
Cl2+2Na-->2NaCl
2NaCl-->Cl2+2Na
Cl2+2NaOH-->NaClO+NaCl+H2O
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
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
a) NaOH + HCl -> NaCl + \(H_2O\)
b) MgO + \(CO_2\) -> \(MgCO_3\)
c) CuO + HCl -> \(CuCl_2\) + \(H_2O\)
a) NaOH + HCl -> NaCl + H2O
b) MgO + CO2 -> MgCO3
c) CuO + 2HCl -> CuCl2 + H2O
a)
\(Fe+2HCl\rightarrow FeCl_2+H_2\)
\(Mg+2HCl\rightarrow MgCl_2+H_2\)
\(Zn+2HCl\rightarrow ZnCl_2+H_2\)
\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
b)
\(CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(FeO+2HCl\rightarrow FeCl_2+H_2O\)
\(Fe_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)
c) \(KOH+HCl\rightarrow KCl+H_2O\)
\(Fe\left(OH\right)_2+2HCl\rightarrow FeCl_2+2H_2O\)
\(Fe\left(OH\right)_3+3HCl\rightarrow FeCl_3+3H_2O\)
d)
\(NaOH+HCl\rightarrow NaCl+H_2O\)
\(AgNO_3+HCl\rightarrow AgCl+HNO3\)
\(CaCO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O\)
\(NaHCO_3+HCl\rightarrow NaCl+H_2O+CO_2\)
\(\left(1\right)2Fe+3Cl_2\rightarrow2FeCl_3\)
\(\left(2\right)FeCl3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)
\(\left(3\right)2Fe\left(OH\right)_3-^{t^o}\rightarrow Fe2O3+3H_2O\)
\(\left(4\right)Fe_2O_3+3H_2-^{t^o}\rightarrow2Fe+3H_2O\)
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