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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
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
4Al+3O2-->2Al2O2
Al2O3+6HCl---->2AlCl3+3H2O
AlCl3+3NaOH---->Al(OH)3+3NaCl
2Al(OH)3-->Al2O3+3H2O
Al2O3+3H2--->2Al+3H2O
1.
2Cu + O2 -(to) → 2 CuO
CuO + H2SO4 → CuSO4 + H2O
CuSO4 + BaCl2 → CuCl2 + BaSO4↓
CuCl2 + 2AgNO3 → Cu(NO3)2 + 2AgCl↓
Cu(NO3)2 + NaOH → Cu(OH)2↓ + 2NaNO3
Cu(OH)2 → CuO + H2O
CuO + CO → Cu + CO2
2.
4Al + 3O2 → 2Al2O3
Al2O3 + 6HCl → 2AlCl3 + 3H2↑
AlCl3 + 3NaOH(vừa đủ) → Al(OH)3 + 3NaCl
2Al(OH)3 → Al2O3 + 3H2O
2Al2O3-(đpnc) → 4Al + 3O2↑
2Al + 2NaOH + 2H2O → 2NaAlO2 + 3H2↑
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
AlCl3 + 3NaOH -> Al(OH)3 + 3NaCl
2Al(OH)3 -> Al2O3 + 3H2O
2Al2O3 \(\underrightarrow{đpnc}\) 4Al + 3O2
b;
4Al + 3O2 -> 2Al2O3
Al2O3 + 2NaOH + 2CO2 + 3H2O -> 2Al(OH)3 + 2NaHCO3
2Al(OH)3 -> Al2O3 + 3H2O
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
a,
\(1.\text{2Mg + O2 → 2MgO}\)
\(2.\text{2HCl + MgO → H2O + MgCl2}\)
\(3.\text{2NaOH + MgCl2 → Mg(OH)2 + 2NaCl }\)
\(4.\text{H2SO4 + Mg(OH)2 → 2H2O + MgSO4}\)
b,
\(1.\text{4Al(bột)+3O2=2Al2O3}\)
\(2.\text{Al2O3 + 6HCl → 2AlCl3 + 3H2O}\)
\(3.\text{AlCl3 + 3NaOH → Al(OH)3 + 3NaCl}\)
\(4.\text{2Al(OH)3=Al2O3+3H2O}\)
a) 2Mg+O2--->2MgO
MgO+2HCl---->MgCl2+H2
MgCl2+2NaOH---->2NaCl+Mg(OH)2
Mg(OH)2+ CuSO4---->Cu(OH)2+MgSO4
b)4 Al+3O2--->2Al2O3
Al2O3+6HCl----->2AlCl3+3H2O
AlCl3+3NaOH---->Al(OH)3+3NaCl
2Al(OH)3---->Al2O3+3H2O
2AlCl3 --->2Al +3Cl2
4Al+3O2----.2Al2O3
Al2O3+3H2SO4---->Al2(SO4)3+3H2O
Al2(SO4)3+3Mg(OH)2---->3MgSO4+ 2Al(OH)3
Al(OH)3+ HNO3----> Al(NO3)3+ 2H2O
1) 2Al+2NaOH+2H2O\(\rightarrow\)2NaAlO2+3H2
2) NaAlO2+CO2+2H2O\(\rightarrow\)NaHCO3+Al(OH)3
3) Al(OH)3+NaOH\(\rightarrow\)NaAlO2+2H2O
4) 2Al(OH)3\(\rightarrow\)Al2O3+3H2O
5) Al2O3+3H2\(\rightarrow\)2Al+3H2O
6) 4Al+3O2\(\rightarrow\)2Al2O3
7) 2Al+ 3FeCl2\(\rightarrow\)2AlCl3+3Fe
8) 4Fe+3O2\(\overset{t^0>450^0C}{\rightarrow}2Fe_2O_3\)
9) Fe2O3+2Al\(\rightarrow\)Al2O3+2Fe
10) Al2O3+2NaOH\(\rightarrow\)2NaAlO2+H2O
11) 2Al+3Fe(NO3)2\(\rightarrow\)2Al(NO3)3+3Fe
12) Al(NO3)3+3NaOH\(\rightarrow\)Al(OH)3+3NaNO3
13) 4Al+3O2\(\rightarrow\)2Al2O3
14) Al2O3+6HCl\(\rightarrow\)2AlCl3+3H2O
15) AlCl3+3NaOH\(\rightarrow\)Al(OH)3+3NaCl
bài 1
a,
(1) 2Al + 6HCl-----> 2AlCl3 + 3H2
(2)AlCl3 + 3NaOH ----> Al(OH)3 + 3NaCl
(3)2Al(OH)3 + 3H2SO4 -----> Al2(SO4)3 + 6H2O
(4)Al2(SO4)3 + 3BaCl2 -------> 2AlCl3 + 3BaSO4
(5) 4AlCl3 + 3O2 --------> 2Al2O3 + 6Cl2
(6)2Al2O3 -------đpnóng chảy, criotit------->4 Al + 3O2
b,
(1) 2Fe + 3Cl2 --------------> 2FeCl3
(2)FeCl3 + 3NaOH -------------> Fe(OH)3 + 3NaCl
(3)2Fe(OH)3 + 3H2SO4 --------------> Fe2(SO4)3 + 6H2O
(4)Fe2(SO4)3 + 3Pb(NO3)2--------------> 2Fe(NO3)3 + 3PbSO4
(5)4Fe(NO3)3 -------------> 2Fe2O3 + 12NO2 + 3O2
(6) Fe2O3 + 3H2 ------> 2Fe + 3H2O
\(MnO_2+4HCl_{đặc,nóng}\rightarrow MnCl_2+Cl_2+2H_2O\\ H_2+Cl_2\rightarrow\left(t^o\right)2HCl\\ NaOH+HCl\rightarrow NaCl+H_2O\\ 2NaCl\rightarrow\left(đpnc\right)2Na+Cl_2\\ 2Al+3Cl_2\rightarrow\left(t^o\right)2AlCl_3\\ AlCl_3+3KOH\rightarrow Al\left(OH\right)_3\downarrow+3KCl\\ Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2o\\ AlCl_3+3AgNO_3\rightarrow Al\left(NO_3\right)_3+3AgCl\downarrow\)
\(MnO_2\underrightarrow{1}Cl\underrightarrow{2}HCl\underrightarrow{3}NaCl\underrightarrow{4}Cl_2\underrightarrow{5}AlCl_3\underrightarrow{6}Al\left(OH\right)_3\underrightarrow{7}AlCl_3\underrightarrow{8}AgCl\)
(1) \(MnO_2+4HCl_{đặc}\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)
(2) \(H_2+Cl_2\xrightarrow[ánh.sáng]{t^o}2HCl\)
(3) \(NaOH+HCl\rightarrow NaCl+H_2O\)
(4) \(2NaCl+2H_2O\xrightarrow[có.màng.ngăn]{điện.phân}2NaOH+H_2+Cl_2\)
(5) \(2Al+3Cl_2\underrightarrow{t^o}2AlCl_3\)
(6) \(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)
(7) \(Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)
(8) \(AlCl_3+3AgNO_3\rightarrow Al\left(NO_3\right)_3+3AgCl\)
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