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a) 1. 3Fe + 2O2 \(\underrightarrow{to}\) Fe3O4
2. Fe3O4 + 8HCl → FeCl2 + 2FeCl3 + 4H2O
3. 2FeCl2 + Cl2 \(\underrightarrow{to}\) 2FeCl3
b) 1. BaO + H2O → Ba(OH)2
2. Ba(OH)2 + CO2 → BaCO3↓ + H2O
3. BaCO3 + 2HCl → BaCl2 + CO2↑ + H2O
BaO + CO2 → BaCO3↓
BaCO3 \(\underrightarrow{to}\) BaO + CO2↑
a)
\(\left(1\right)3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)
\(\left(2\right)Fe_3O_4+8HCl\underrightarrow{t^o}FeCl_2+4H_2O+2FeCl_3\)
\(\left(3\right)2FeCl_2+Cl_2\underrightarrow{t^o}2FeCl_3\)
b)
\(\left(1\right)BaO+H_2O\rightarrow Ba\left(OH\right)_2\)
\(\left(2\right)Ba\left(OH\right)_2+CO_2\rightarrow BaCO_3+H_2O\)
(3)\(BaCO_3+2HCl\rightarrow BaCl_2+CO_2+H_2O\)
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
Giải:
a)
S + O2 -t0-> SO2↑
2SO2 + O2 -t0-> 2SO3↑
2SO3 + H2 -> H2SO4 + SO2↑
3H2SO4 + 2Al -> Al2(SO4)3 + 3H2↑
H2 + FeO -> Fe + H2O
3Fe + 2O2 -t0-> Fe3O4
b)
2Ba + O2 -> 2BaO
BaO + H2O -> Ba(OH)2
Ba(OH)2 + 2CO2 = Ba(HCO3)2
a)
\(\left(1\right)S+O_2\underrightarrow{t^o}SO_2\)
\(\left(2\right)SO_2+O_2\underrightarrow{t^o}SO_3\)
\(\left(3\right)SO_3+H_2O\rightarrow H_2SO_4\)
\(\left(4\right)2K+H_2SO_4\rightarrow K_2SO_4+H_2\uparrow\)
\(\left(5\right)FeO+H_2\rightarrow Fe+H_2O\)
\(\left(6\right)3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)
\(b.\)
\(\left(1\right)2Ba+O_2\underrightarrow{t^o}2BaO\)
\(\left(2\right)BaO+H_2O\rightarrow Ba\left(OH\right)_2\)
\(\left(3\right)Ba\left(OH\right)_2+CO_2\rightarrow Ba\left(HCO_3\right)_2\)
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
BaO+H2O-----Ba(OH)2
Ba(OH)2+CO2---->BaCO3+H2O
BaCO3+2HCl---->BaCl2+H2O+CO2
\(BaO+H2O\rightarrow Ba\left(OH\right)2\)
\(\text{Ba(OH)2 + Ba(HCO3)2 → H2O + 2BaCO3}\)
\(\text{2HCl + BaCO3 → BaCl2 + H2O + CO2}\)