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CaCO3+HCl-->CaCl2+CO2+H2O
CaCl2+Na2CO3-->CaCO3+NaCl
CaCO3-->CaO+CO2
CaO+H2O-->Ca(OH)2
Ca(OH)2+HNO3-->Ca(NO3)2+H2O
E)
Cu+O2-->CuO
CuO+H2-->Cu+H2O
CuO+..->Cu(Oh)2
Cu(Oh)2+HCl-->CuCl2+H2o
G)Na2SO3+CaCL2-->CaSO3+NaCl
S+O2-->SO2
SO2+H2O-->H2SO3
H2SO3+Ca--->CaSO3+H2
CaSO3+HCl-->CaCL2+SO2+H2O
S8+O2-->SO3
SO3+H2O-->H2SO4
H2SO4+Fe2O3-->Fe2(SO4)3+H2
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
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↑
(1) Cu(OH)2 + MgSO4 → CuSO4 + Mg(OH)2
(2) CuSO4 + BaCl2 → CuCl2 + BaSO4
(3) CuCl2 + 2 AgNO3 → Cu(NO3)2 + 2 AgCl
(4) 3Cu(NO3)2 + 2Al → 2Al(NO3)3 + 3Cu
(5) Al(NO3)3 + 3 NaOH → Al(OH)3 + 3 NaNO3
(6) Al(OH)3 → Al2O3 + H2O (nhiệt phân hủy)
Sai sót mong bỏ qua 
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
1/ 2Al(OH)3 --> Al2O3 + 3H2O
2/ Cu(OH)2 + H2So4 --> CuSo4 + 2H2O
3/ P2O5 + 6NaOH --> 2Na3PO4 + 3H2O
4/ AgNo3 + NaCl --> NaNo3 + AgCl
5/ FeCl2 + 2NaOH --> Fe(OH)2 + NaCl
6/ CuO + 2HCl --> 2H2O + CuCl2
7/ CuSO4 + 2NaOH --> Cu(OH)2 + Na2SO4
8/ Ca(OH)2 + H2SO4 --> CaSO4 + 2H2O
1. Al2O3 + H2O
2. H2SO4\(\rightarrow\) H2O
3. NaOH \(\rightarrow\)H2O
4. NaCl \(\rightarrow\) AgCl
5. NaOH \(\rightarrow\) NaCl
6. HCl \(\rightarrow\) H2O
7. Cu(OH)2 + Na2SO4
8. CaSO4 + H2O
a)
CaCO3 → CaO + CO2 (to)
CaO + H2O → Ca(OH)2
Ca(OH)2 + CO2 → CaCO3 + H2O
b)
CaO + 2HCl → CaCl2 + H2O
c)
Ca(OH)2 + 2AgNO3 → Ca(NO3)2 + Ag2O + H2O
1/ Cao + H2O------> Ca (OH)2
2/ Ca (OH)2 + Fe(NO3)2 -----> Ca (NO3)2+Fe(OH)2
3/ Ca(NO3)2 + H2SO4---> CaSO4+2HNO3
4/ CuCl2 + 2NaOH -----> Cu(OH)2+2NaCl
5/ Cu(OH)2 + Na2SO4-----> CuSO4+2NaOH
6/ CuSO4 +Ba(NO3)2 ------> Cu (NO3)2+BaSO4
7/ CuO +2HCl----> CuCl2+H2O
1. CaO + H2O = Ca(OH)2
2. Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H2O
3. Không xảy ra pứ này
4. CuCl2 +2NaOH = 2NaCl + Cu(OH)2
5. Cu(OH)2 + H2SO4 = CuSO4 + 2H2O
6. CuSO4 + Ba(NO3)2 = Cu(NO3)2 + BaSO4
7. CuO + 2HCl = CuCl2 +H2O
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Bài của Duong Le
Thứ nhất: pt số 3 sẽ k xảy ra pứ
Thứ hai: pt số 5 sai