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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
1/2 Cu + O2 --t-> 2CuO
2/ 2Al + 3CuCl2 -----> 2AlCl3 + 3Cu
3/ Na2SO4 + Ba(NO3)2 ----> BaSO4 + 2NaNO3
4/ Fe2O3 + 3CO --t--> 2Fe + 3CO2
5/ 2FeO + 4H2SO4 đặc nóng --t--> Fe2(SO4)3 + SO2 + 4H2O
a,
Phải là FeCl3--->Fe(OH)3
\(\text{FeCl3 + 3NaOH -> Fe(OH)3 + 3NaCl }\)
\(\text{2Fe(OH)3 - to--> Fe2O3 + 3H2O}\)
\(\text{Fe2O3 + 3H2SO4 -> Fe2(SO4)3 + 3H2O}\)
\(\text{Fe2(SO4)3 + 3BaCl2 -> 2FeCl3 + 3BaSO4}\)
\(\text{2FeCl3 + 3Ca(OH)2 -> 2Fe(OH)3 + 3CaCl2}\)
b,
\(\text{SO2 + 2NaOH -> Na2SO3 + H2O}\)
\(\text{Na2SO3 + H2SO4 -> Na2SO4 + SO2 + H2O}\)
\(\text{Na2SO4 + Ba(OH)2 -> BaSO4 + 2NaOH}\)
\(\text{2NaOH + ZnCl2 -> Zn(OH)2 + 2NaCl}\)
\(\text{Zn(OH)2 --to--> ZnO + H2O}\)
1) 2Al+2NaOH+2H2O\(\rightarrow\)2NaAlO2+3H2
2) NaAlO2+CO2+2H2O\(\rightarrow\)NaHCO3+Al(OH)3
3) Al(OH)3+NaOH\(\rightarrow\)NaAlO2+2H2O
4) 2Al(OH)3\(\rightarrow\)Al2O3+3H2O
5) Al2O3+3H2\(\rightarrow\)2Al+3H2O
6) 4Al+3O2\(\rightarrow\)2Al2O3
7) 2Al+ 3FeCl2\(\rightarrow\)2AlCl3+3Fe
8) 4Fe+3O2\(\overset{t^0>450^0C}{\rightarrow}2Fe_2O_3\)
9) Fe2O3+2Al\(\rightarrow\)Al2O3+2Fe
10) Al2O3+2NaOH\(\rightarrow\)2NaAlO2+H2O
11) 2Al+3Fe(NO3)2\(\rightarrow\)2Al(NO3)3+3Fe
12) Al(NO3)3+3NaOH\(\rightarrow\)Al(OH)3+3NaNO3
13) 4Al+3O2\(\rightarrow\)2Al2O3
14) Al2O3+6HCl\(\rightarrow\)2AlCl3+3H2O
15) AlCl3+3NaOH\(\rightarrow\)Al(OH)3+3NaCl
C+O2-->CO2
CO2+ Na2O--->Na2CO3
Na2CO3+H2O--->NaHCO3+NaOH
ko có công thức là Na2HCO3 nha
NaHCO3+NaOH----> Na2CO3 +H2O
Na2CO3--->CO2+Na2O
1/ C + 2H2 -Ni,500oC-> CH4
2/ CH3COONa + NaOH -CaO, to-> CH4↑ + Na2CO3
3/ Al4C3 + 12H2O → 3CH4↑ + 4Al(OH)3↓
4/ CH4 + 2O2 -to-> CO2↑ + 2H2O
5/ CH4+ 2Cl2 -as-> CH2Cl2 + 2HCl↑
6/ CH2Cl2 + Cl2 -as-> CHCl3 + HCl ↑
7/ CHCl3 + Cl2 -as-> CH2Cl2 + HCl↑
8/ C2H4 + H2 →Ni C2H6↑
9/ n(CH2=CH2) →to, P (-CH2-CH2-)n(PE)
10/ C2H5OH →H2SO4đ C2H4↑ + H2O
11/ C2H2 + H2 →to, Pb C2H4↑
12/ CaC2 + 2H2O → C2H2↑ + Ca(OH)2
2NaCl + 2H2O \(\underrightarrow{đpddcmn}\)2NaOH + Cl2 + H2
Cl2 + H2 \(\rightarrow\)2HCl
Fe2O3 + 6HCl \(\rightarrow\)2FeCl3 + 3H2
2FeCl3 + Cu \(\rightarrow\)CuCl2 + 2FeCl2
câu 1;
1/FeCl3 + 3NaOH => Fe(OH)3 + 3NaCl
2/ 2Fe(OH)3 --> Fe2O3 + 3H2O
3/ Fe2O3 +3 H2SO4 ==> Fe2(SO4)3 + 3H2O
4/ Fe2(SO4)3 + 6HCl ==> 2FeCl3 +3 H2SO4
5/ FeCl3 + Al ==> AlCl3 + Fe
a;
4FeS2 +7O2 ->2Fe2O3 +8SO2
SO2 + ba(OH)2 -> BaSO3 + H2O
BaSO3 + SO2 + H2O -> Ba(HSO3)2
BaSO3 + SO2 + H2O <-Ba(HSO3)2
thêm 2 pt chỗ câu a:
BaSO3 -> BaO + SO2
2SO2 + O2 -> 2SO3 (pt 1,5,6 có to)
2Mg+O2--> 2MgO(1)
MgO+2HCl-->MgCl2+H2O(2)
MgCl2+2NaOH--> Mg(OH)2+2NaCl(3)
Mg(OH)2+CuSO4-->MgSO4+Cu(OH)2(4)
MgSO4+Ba(NO3)2-->Mg(NO3)2+BaSO4(5)
CuO+H2SO4-->CuSO4+H2O(1)
CuSO4+2NaOH-->Cu(OH)2+Na2SO4(2)
Cu(OH)2+2HCl-->CuCl2+2H2O(3)
CuCl2+2AgNO3-->Cu(NO3)2+2AgCl(4)
Cu(NO3)2+Mg-->Mg(NO3)2+Cu(5)