SO2-->Na2SO3-->Na2SO4-->NaOH-->NaCO3
CaO-->CaCO3-->CaO-->Ca(OH)2-->CaCO3-->CaSO4
Fe-->FeCl3-->Fe(OH)3-->Fe2O3-->Fe2(SO4)3-->FeCl3
Fe-->FeCl2-->Fe(NO3)2-->Fe(OH)2-->FeSO4
Cu-->CuO-->CuCl2-->Cu(OH)2-->CuO-->Cu-->CuSO4
Al2O3-->Al-->AlCl3-->NaCl-->NaOH-->Cu(OH)2
Fe-->FeCl3-->Fe(OH)3-->Fe2O3
Fe(NO3)3-->Fe(OH)3-->Fe2O3-->Fe-->FeCl2
| Na2O | + | SO2 | → |
Na2SO3 |
| H2SO4 | + | Na2SO3 | → | H2O | + | Na2SO4 | + |
SO2 |
| Na2SO4 | + | Ba(OH)2 | → | 2NaOH | + |
BaSO4 |
Chán quá nhiều vậy
CaO+Ca(OH)2\(\rightarrow\)CaCO3+H2O
CaCO3\(\overset{t^0}{\rightarrow}CaO+CO_2\)
CaO+H2O\(\rightarrow\)Ca(OH)2
Ca(OH)2+Na2CO3\(\rightarrow\)CaCO3+2NaOH
CaCO3+H2SO4\(\rightarrow\)CaSO4+CO2+H2O
2Fe+3Cl2\(\overset{t^0}{\rightarrow}2FeCl_3\)
FeCl3+3NaOH\(\rightarrow\)Fe(OH)3+3NaCl
2Fe(OH)3\(\overset{t^0}{\rightarrow}Fe_2O_3+3H_2O\)
Fe2O3+3H2SO4\(\rightarrow\)Fe2(SO4)3+3H2O
Fe2(SO4)3+3BaCl2\(\rightarrow\)2FeCl3+3BaSO4
Fe+2HCl\(\rightarrow\)FeCl2+H2
FeCl2+2AgNO3\(\rightarrow\)Fe(NO3)2+2AgCl
Fe(NO3)2+2NaOH\(\rightarrow\)Fe(OH)2+2NaNO3
Fe(OH)2+H2SO4\(\rightarrow\)FeSO4+2H2O
2Cu+O2\(\overset{t^0}{\rightarrow}2CuO\)
CuO+2HCl\(\rightarrow\)CuCl2+H2O
CuCl2+2NaOH\(\rightarrow\)Cu(OH)2+2NaCl
Cu(OH)2\(\overset{t^0}{\rightarrow}CuO+H_2O\)
CuO+H2\(\overset{t^0}{\rightarrow}Cu+H_2O\)
Cu+2H2SO4(đ, nóng)\(\overset{t^0}{\rightarrow}CuSO_4+SO_2+2H_2O\)
Al2O3+2Fe\(\overset{t^0}{\rightarrow}2Al+Fe_2O_3\)
2Al+3Cl2\(\overset{t^0}{\rightarrow}2AlCl_3\)
AlCl3+3NaOH\(\rightarrow\)Al(OH)3+3NaCl
2NaCl+2H2O\(\overset{đp,mnx}{\rightarrow}2NaOH+Cl_2+H_{2_{ }}\)
2NaOH+CuSO4\(\rightarrow\)Cu(OH)2+Na2SO4
2Fe+3Cl2\(\overset{t^0}{\rightarrow}2FeCl_3\)
FeCl3+3NaOH\(\rightarrow\)Fe(OH)3+3NaCl
2Fe(OH)3\(\overset{t^0}{\rightarrow}Fe_2O_3+3H_2O\)
Fe(NO3)3+3NaOH\(\rightarrow\)Fe(OH)3+3NaNO3
2Fe(OH)3\(\overset{t^0}{\rightarrow}Fe_2O_3+3H_2O\)
Fe2O3+3H2\(\overset{t^0}{\rightarrow}2Fe+3H_2O\)
Fe+2HCl\(\rightarrow\)FeCl2+H2
2Al2O3 ------> 4Al + 3O2 ( điện phân nóng chảy)
2Al + 6HCl ------> 2AlCl3 + 3H2
AlCl3 + 3NaOHthiếu -----> Al(OH)3 +3 NaCl
2NaCl + 2H2O -------> 2NaOH + H2 + Cl2 ( điện phân có màng ngăn)
2NaOH + CuCl2------> 2NaCl + Cu(OH)2
2Cu + O2 -----> 2CuO( nhiệt độ)
CuO + 2HCl -----> CuCl2 + H2O
CuCl2 + 2NaOH-------> Cu(OH)2 + 2NaCl
Cu(OH)2------> CuO + H2O ( nhiệt độ)
CuO + H2 -----> Cu + H2O
Cu +2 H2SO4 -----> CuSO4 + SO2 + 2H2O ( H2SO4 đặc ,nóng )