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a(1),fe+2hcl->fecl2+h2 (2) fecl2+ba(oh)2->fe(oh)2+bacl2 (3)fe(oh)2+h2so4->feso4+2h20 (4)feso4+bacl2->fecl2+baso4
b.(1)2fe+3cl2->2fecl3 (2)2fecl3+3ba(oh)2->2fe(oh)3+3bacl2 (3)2fe(oh)3+o2->fe2o3+h2o (4)fe2o3+3co->2fe+3co2
g) 1. Fe2O3 + 6HCl → 2FeCl3 + 3H2O
2. FeCl3 + 3NaOH → 3NaCl + Fe(OH)3↓
3. 2Fe(OH)3 \(\underrightarrow{to}\) Fe2O3 + 3H2O
4. Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O
h) 1. ZnCl2 + 2NaOH → 2NaCl + Zn(OH)2↓
2. Zn(OH)2 + 2HCl → ZnCl2 + 2H2O
3. ZnCl2 + 2NaOH → 2NaCl + Zn(OH)2↓
4. NaCl + AgNO3 → NaNO3 + AgCl↓
*Hoàn thành ptpư theo sơ đồ :
\(Cu+\dfrac{1}{2}O_2\underrightarrow{t^o}CuO\)
\(CuO+2HCl\rightarrow CuCl_2+H_2O\)
\(CuCl_2+Fe\rightarrow Cu+FeCl_2\)
a) H2 + Fe2O3 →to→ fe + h2o
b) H2 + Al2O3 →to→...............(k có)
c) Ca + H2O → ca(oh)2 + h2o
d) Mg + H2O → mg(oh)2 + h2o
e) K2O + H2O → koh
Fe2O3+ 3H2\(\xrightarrow[]{to}\) 2Fe+ 3H2O
Ca+ 2H2O\(\rightarrow\) Ca(OH)2+ H2\(\uparrow\)
Al2O3+ H2 không phản ứng
Mg+ H2O không phản ứng
K2O+ H2O\(\rightarrow\) 2KOH
Hoàn thành các phương trình phản ứng sau:
Zn + H2SO4 → ZnSO4 + H2
HCl + NaOH → NaCl + H2O
H2SO4 + Cu(OH)2 → CuSO4 + 2H2O
K2SO3 + 2HCl → 2KCl + SO2 + H2O
Na2SO3 + H2SO4 → Na2SO4 + SO2 + H2O
S + O2 \(\rightarrow\) SO2
4FeS2 + 11O2 \(\rightarrow\) 2Fe2O3 + 8SO2
2SO2 + O2 \(\rightarrow\) 2SO3
SO3 + H2O → H2SO4
Zn + H2SO4 →ZnSO4+H2
HCl + NaOH →NaCl+H2O
H2SO4 + Cu(OH)2 →CuSO4+2H2O
K2SO3 + 2HCl →2KCl+SO2+H2O
Na2SO3 + H2SO4 →Na2SO4+SO2+H2O
S + O2 to→toSO2
FeS2 + O2 to→Fe2O3+SO2
SO2 + O2 to→SO3
SO3 + H2O →H2SO4
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
a) Cu + O2\(\rightarrow\) CuO
CuO + HCl\(\rightarrow\) CuCl2 + H2O
CuCl2 + NaOH\(\rightarrow\)Cu(OH)2 + NaCl
Cu(OH)2 + H2SO4\(\rightarrow\)CuSO4 + H2O
CuSO4 + Fe\(\rightarrow\) FeSO4 + Cu
b) Fe + Cl2 \(\rightarrow\) FeCl3
FeCl3 + NaOH\(\rightarrow\) Fe(OH)3 + NaCl
Fe(OH)3 \(\underrightarrow{nhietphan}\) Fe2O3 + H2O
Fe2O3 + H2SO4 \(\rightarrow\) Fe2(SO4)3 + H2O
Fe2(SO4)3 + BaCl2 \(\rightarrow\)FeCl3 + BaSO4
c) Fe + Cl2 \(\rightarrow\) FeCl3
FeCl3 + NaOH\(\rightarrow\) Fe(OH)3 + NaCl
Fe(OH)3\(\underrightarrow{nhietphan}\) Fe2O3 + H2O
Fe2O3 + CO\(\underrightarrow{^{to}}\) Fe + CO2
Fe + HCl \(\rightarrow\) FeCl2 + H2
d) Al + O2 \(\rightarrow\) Al2O3
Al2O3 + HCl\(\rightarrow\)AlCl3 + H2O
AlCl3 + NaOH \(\rightarrow\)Al(OH)3 + NaCl
Al(OH)3 \(\underrightarrow{nhietphan}\) Al2O3 + H2O
Al2O3 \(\underrightarrow{nhietphan}\) Al + O2
Hoàn thành các phương trình phản ứng sau:
Na2O + CO2 → Na2CO3
C12H22O11 ---H2SO4 đặc---> 12C + 11H2O
CaO + 2HCl → CaCl2 + H2O
Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O
CO2 + Ca(OH)2 → CaCO3 + H2O
SO2 + 2NaOH → Na2SO3 + H2O
Mg + 2HCl → MgCl2 + H2
2Al + 3H2SO4 →Al2(SO4)3 + 3H2
Fe + 2HCl → FeCl2 + H2
Na2O + CO2 →Na2CO3
C12H22O11 H2SO4đăc\(\rightarrow\)11H2O+12C
CaO + 2HCl →CaCl2+H2O
Fe2O3 + 3H2SO4 →Fe2(SO4)3+3H2O
CO2 + Ca(OH)2 →CaCO3+H2O
SO2 + 2NaOH →Na2SO3+H2O
Mg + 2HCl →MgCl2+H2
2Al + 3H2SO4 →Al2(SO4)3+3H2
Fe + 2HCl →FeCl2+H2
\(\left(1\right)2Fe+3Cl_2\xrightarrow[t^0]{}2FeCl_3\\ \left(2\right)FeCl_2+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\\ \left(3\right)2Fe\left(OH\right)_3\xrightarrow[t^0]{}Fe_2O_3+3H_2O\\ \left(4\right)Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
____________
\(\left(1\right)2Al+3Cl_2\rightarrow2AlCl_3\\ \left(2\right)AlCl_3+3AgNO_3\rightarrow Al\left(NO_3\right)_3+3AgCl\\ \left(3\right)Al\left(NO_3\right)_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaNO_3\\ \left(4\right)2Al\left(OH\right)_3\xrightarrow[t^0]{}Al_2O_3+3H_2O\\ \left(5\right)Al_2O_3+3CO\xrightarrow[]{t^0}2Al+3CO_2\\ \left(6\right)4Al+3O_2\xrightarrow[]{t^0}2Al_2O_3\\ \left(7\right)2Al+3H_2SO_4\xrightarrow[]{}Al_2\left(SO_4\right)_3+3H_2\\ \left(8\right)Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow2AlCl_3+3BaSO_4\)