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c) 4FeS2+ 11O2--->8SO2 +2Fe2O3
Fe2O3+3H2--->2Fe+3H2O
2Fe +6HCl--->2FeCl3 +3H2
FeCl3+3NaOH--->Fe(OH)3+ 3NaCl
2Fe(OH)3 +3H2SO4---->Fe2(SO4)3 +3H2O
d)2 Fe +6HCl-->2FeCl3+3H2
FeCl3 + 3NaOH--->Fe(OH)3 +3NaCl
2Fe(OH)3 --->Fe2O3 +3H2O
e) Fe +2HCl---.FeCl2 +H2
FeCl2+2NaOH---->Fe(OH)2 +2NaCl
Fe(OH)2 +2AgNO3---> Fe(NO3)2 +2AgOH
Chúc bạn học tốt
Nhớ tích cho mình nhé
a) 4K+ O2--->2K2O
K2O+H2O-------->.2KOH
KOH+ NaCO3--->K2CO3+NaOH
K2CO3+2HCl---->2KCl+H20+CO2
B) 2Cu+O2---->2CuO
CuO+H2SO4---->CuSO4+ H2O
CuSO4+ 2NaOH--->Cu(OH)2 +Na2SO4
Cu(OH)2----->CuO+H2O
2CuO--->2Cu+O2
Chúc bn học tốt
a) 2Fe+3Cl2--->2FeCl3
FeCl3+3NaOH--->3NaCl+Fe(OH)3
3Fe(OH)3-->Fe2O3+3H2O
Fe2O3+H2---->2Fe+3H2O
Fe+H2SO4---->FeSO4+H2
FeSO4+BaCl2---->FeCl2+BaSO4
b) Fe+2HCl--->FeCl2+H2
FeCl2+AgNO3--->2AgCl+Fe(NO3)2
Fe(NO3)2+2NaOH--->2NaNO3+Fe(OH)2
Fe(OH)2+Na2SO4--->2NaOH+FeSO4
FeSO4+Zn----->ZnSO4+Fe
Fe+.....Ko biết
c)4 Al+3O2--->2Al2O3
Al2O3+3H2SO4--->Al2(SO4)3+3H2O
Al2(SO4)3+3BaCl2---->2AlCl3+3BaCl2
Alcl3+3NaOH--->Al(OH)3+3NaCl
2Al(OH)3--->Al2O3+3H2O
2Al2O3--->4Al+3O2
a) 2Fe+3Cl2--->2FeCl3
FeCl3+3NaOH--->3NaCl+Fe(OH)3
3Fe(OH)3-->Fe2O3+3H2O
Fe2O3+H2---->2Fe+3H2O
Fe+H2SO4---->FeSO4+H2
FeSO4+BaCl2---->FeCl2+BaSO4
b) Fe+2HCl--->FeCl2+H2
FeCl2+AgNO3--->2AgCl+Fe(NO3)2
Fe(NO3)2+2NaOH--->2NaNO3+Fe(OH)2
Fe(OH)2+Na2SO4--->2NaOH+FeSO4
FeSO4+Zn----->ZnSO4+Fe
ko có PTHH
c)4 Al+3O2--->2Al2O3
Al2O3+3H2SO4--->Al2(SO4)3+3H2O
Al2(SO4)3+3BaCl2---->2AlCl3+3BaCl2
Alcl3+3NaOH--->Al(OH)3+3NaCl
2Al(OH)3--->Al2O3+3H2O
2Al2O3--->4Al+3O2
a, S + O2 \(\rightarrow\) SO2
2SO2 + O2 \(\rightarrow\) 2SO3
SO3 + H2O \(\rightarrow\) H2SO4
H2SO4 + Na2O \(\rightarrow\) Na2SO4 + H2O
Na2SO4 + Ba(OH)2 \(\rightarrow\)2NaOH + BaSO4
b, SO2 + Na2O \(\rightarrow\) Na2SO3
Na2SO3 + H2SO4 \(\rightarrow\) Na2SO4 + SO2 + H2O
Na2SO4 + Ba(OH)2 \(\rightarrow\)2NaOH + BaSO4
2NaOH + H2SO3 \(\rightarrow\) Na2SO3 + H2O
c, CaO + CO2 \(\rightarrow\) CaCO3
CaCO3 \(\rightarrow\) CaO + CO2
CaO + H2O \(\rightarrow\) Ca(OH)2
Ca(OH)2 + CO2 \(\rightarrow\) CaCO3 + H2O
CaCO3 + H2SO4 \(\rightarrow\) CaSO4 + CO2 + H2O
d, 2Fe + 3Cl2 \(\rightarrow\) 2FeCl3
FeCl3 +3NaOH \(\rightarrow\) Fe(OH)3 + 3NaCl
2Fe(OH)3 \(\rightarrow\) Fe2O3 +3H2O
Fe2O3 +3H2SO4\(\rightarrow\) Fe2(SO4)3 +3H2O
Fe2(SO4)3 +3BaCl2 \(\rightarrow\)2FeCl3 +3BaSO4
e, Fe +2HCl \(\rightarrow\) FeCl2 + H2
FeCl2 +2AgNO3 \(\rightarrow\) Fe(NO3)2 +2AgCl
Fe(NO3)2 +2NaOH \(\rightarrow\) Fe(OH)2 +2NaNO3
Fe(OH)2 \(\rightarrow\) FeO + H2O
FeO + H2SO4 \(\rightarrow\) FeSO4 + H2O
f, 2Cu + O2 \(\rightarrow\) 2CuO
CuO +2HCl \(\rightarrow\) CuCl2 + H2O
CuCl2 +2NaOH \(\rightarrow\) Cu(OH)2 +2NaCl
Cu(OH)2 \(\rightarrow\) CuO + H2O
CuO + CO \(\rightarrow\) Cu + CO2
Cu + AgSO4 \(\rightarrow\) CuSO4 + Ag
g,2Al2O3 \(\rightarrow\)4Al + 3O2
2Al + 6HCl \(\rightarrow\) 2AlCl3 + 3H2
AlCl3 +3NaOH \(\rightarrow\) Al(OH)3 +3NaCl
2NaCl + 2H2O \(\rightarrow\) 2NaOH + Cl2 + H2
2NaOH +CuCl2 \(\rightarrow\) Cu(OH)2 +2NaCl
a) S +O2(1)-> SO2
(2)2SO2+O2-> 2SO3
(3)SO3+H2O---> H2SO4
(4)H2SO4+2NaOH-> Na2SO4+2H2O
(5)Na2SO4+BaCl2----> BaSO4+2NaCl
b) 2Fe +3Cl2---->2FeCl3
(2)FeCl3+3NaOH-> Fe(OH)3 +3NaCl
(3)2Fe(OH)3----> Fe2O3+3H2O
(4)Fe2O3+3H2SO4--> Fe2(SO4)3+3H2O
(5)Fe2(SO4)3+6NaCl-> 2FeCL3+3Na2SO4
c) Fe +2HCl--> FeCl2+H2
(2)FeCl2+2AgNO3-> Fe(NO3)2 +2AgCl
(3)Fe(NO3)2+2NaOH----> Fe(OH)2 +2NaNO3
(4)Fe(OH)2+MgSO4---> FeSO4+Mg(OH)2
d) 4Al+3o2 ----> 2Al2O3
(2)Al2O3+3H2SO4---> Al2(SO4)3 +3H2O
(3)Al2(SO4)3+3BaCl2-> 2AlCl3 +3BaSO4
(4)AlCl3+3AgNO3----> Al(NO3)3 +3AgCl
(5)Al(NO3)3+3NaOH-> Al(OH)3 +3NaNO3
(6)2Al(OH)3-----> Al2O3+3H2O
e) 4Na +O2-> 2Na2O
(2)Na2O+H2O-> 2NaOH
(3)2NaOH+H2SO4-> Na2SO4+2H2O
(4)Na2SO4+BaCl2-> 2NaCl+BaSO4
(5)NaCl+AgNO3---> NaNO3+AgCl
a) 1. Fe + 2HCl -> FeCl2 + H2
2. FeCl2 + Ba(OH)2 ->Fe(OH)2 +BaCl2
3. Fe(OH)2 + H2SO4 -> FeSO4 + 2H2O
4. FeSO4 + BaCl2 -> FeCl2 + BaSO4
b) 1. 2Fe + 3Cl2 -> 2FeCl3 (đk: to > 250oC)
2. 2FeCl3+ 3Ba(OH)2 -> 2Fe(OH)3 + 3BaCl2
3. 2Fe(OH)3 -> Fe2O3 + 3H2O (đk: to)
4. Fe2O3 + 3H2 -> 2Fe + 3H2O
b)
(1) 2Fe +6 HCl -> 2FeCl3 + 3H2\(\uparrow\)
(2) 2FeCl3 + 3Ba(OH)2 -> 2Fe(OH)3 + 3BaCl2
(3) 2Fe(OH)3 -> Fe2O3 +3 H2O ( pứ cần to)
(42 Fe2O3 + 6H2 ->2 Fe + 3H2O
Fe + 3Cl2 --->nhiệt độ 2 FeCl3
2FeCl3 +Fe -->3FeCl2
FeCl2 + 2NaOH -->nhiệt độ 2Fe(OH)2 +2NaCl
4Fe(OH)2 +O2 +2H2O ---> không khí; nhiệt độ 4Fe(OH)3
2Fe(OH)3 ---> nhiệt độ Fe2O3 + 3H2O
a;
Fe + 2HCl -> FeCl2 + H2
FeCl2 + 2NaOH -> Fe(OH)2 + 2NaCl
Fe(OH)2 + H2SO4 -> FeSO4 + 2H2O
b;
2Fe + 3Cl2 -> 2FeCl3
FeCl3 + 3NaOH -> Fe(OH)3 + 3NaCl
2Fe(OH)3 \(\underrightarrow{t^o}\)Fe2O3 + 3H2O
Fe2O3 + 3H2SO4 -> Fe2(SO4)3 + 3H2O