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![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,Mg+2HCl\to MgCl_2+H_2\\ b,2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3\\ c,2NaOH+H_2SO_4\to Na_2SO_4+2H_2O\\ d,2Fe_xO_y+\dfrac{3x-2y}{2}O_2\xrightarrow{t^o}xFe_2O_3\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bạn tự chỉ ra tỉ lệ số nguyên tử, phân tử các chất trong pư nhé!
1. \(4Na+O_2\underrightarrow{t^o}2Na_2O\)
2. \(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)
3. \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)
4. \(P_2O_5+3H_2O\rightarrow2H_3PO_4\)
5. \(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)
6. \(2KClO_3\underrightarrow{t^o}2KCl+3O_2\)
7. \(Mg+2HCl\rightarrow MgCl_2+H_2\)
8. \(Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\)
9. \(2Al+6HCl\rightarrow2AlCl_3+3H_2\)
10. \(C_2H_6+\dfrac{7}{2}O_2\underrightarrow{t^o}2CO_2+3H_2O\)
11. \(BaCl_2+2AgNO_3\rightarrow Ba\left(NO_3\right)_2+2AgCl_{\downarrow}\)
12. \(Al_2\left(SO_4\right)_3+3Ba\left(OH\right)_2\rightarrow2Al\left(OH\right)_{3\downarrow}+3BaSO_{4\downarrow}\)
13. \(Cu+2H_2SO_{4\left(đ\right)}\underrightarrow{t^o}CuSO_4+SO_2+2H_2O\)
14. \(8Al+3Fe_3O_4\underrightarrow{t^o}4Al_2O_3+9Fe\)
15. \(Fe_2O_3+3CO\underrightarrow{t^o}2Fe+3CO_2\)
16. \(Fe_3O_4+4CO\underrightarrow{t^o}3Fe+4CO_2\)
17. (giống PT 10)
18. \(C_4H_8+6O_2\underrightarrow{t^o}4CO_2+4H_2O\)
19. \(C_2H_2+\dfrac{5}{2}O_2\underrightarrow{t^o}2CO_2+H_2O\)
20. \(MnO_2+4HCl_{\left(đ\right)}\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)
Bạn tham khảo nhé!
\((1)4Na+O_2\xrightarrow{t^o}2Na_2O\\ (2)4Al+3O_2\xrightarrow{t^o}2Al_2O_3\\ (3)2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3\\ (4)P_2O_5+3H_2O\to 2H_3PO_4\\ (5)2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O\\ (6)2KClO_3\xrightarrow[MnO_2]{t^o}2KCl+3O_2\\ (7)Mg+2HCl\to MgCl_2+H_2\\ (8)Fe_2O_3+6HCl\to 2FeCl_3+3H_2O\\ (9)2Al+6HCl\to 2AlCl_3+3H_2\\ (10)2C_2H_6+7O_2\to 6H_2O+4CO_2\\ (11)BaCl_2+AgNO_3\to Ba(NO_3)_2+AgCl\downarrow\)
\((12)Al_2(SO_4)_3+3Ba(OH)_2\to 3BaSO_4\downarrow+2Al_2(SO_4)_3\\ (13)Cu+2H_2SO_{4(đ)}\xrightarrow{t^o}CuSO_4+2H_2O+SO_2\uparrow\\ (14)8Al+3Fe_3O_4\to 4Al_2O_3+9Fe\\ (15)Fe_2O_3+2CO\xrightarrow{t^o}2Fe+3CO_2\\ (16)Fe_3O_4+4CO\xrightarrow{t^o}3Fe+4CO_2\\ (17)2C_2H_6+7O_2\to 4CO_2+6H_2O\\ (18)C_4H_8+6O_2\xrightarrow{t^o}4CO_2+4H_2O\\ (20)MnO_2+4HCl\xrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a/ 2Mg + O2 ==> 2MgO
b/ 2Fe + 3Cl2 ===> 2FeCl3
c/ 2Al(OH)3 =(nhiệt)=> Al2O3 + 3H2O
d/ CaCO3 + 2HCl ===> CaCl2 + CO2 + H2O
a) 2 Mg +O2 ->2 MgO
b)2 Fe +3 Cl2 -> 2 FeCl3
c)2 Al(OH)3 -> Al2O3 +3 H2O
d) CaCO3 +2 HCl -> CaCl2 +H2O +CO2
![](https://rs.olm.vn/images/avt/0.png?1311)
a) P + O2 ---> P2O5
P + O2 ---> 2P2O5
4P+ 5O2 -> 2P2O5
b)Fe(OH)3 ---> Fe2O3 + H2O
2Fe(OH)3 -> Fe2O3 + 3H2O
c) NaNO3 ---> NaNo2 + O2
2NaNO3 ---->NaNo2 + O2
2NaNO3 ->2NaNo2 + O2
d) K + H2O ---> KOH + H2
2K + 2H2O - > 2KOH +H2
Mấy câu còn lại làm tương tự em ạ
![](https://rs.olm.vn/images/avt/0.png?1311)
a) $4P + 5O_2 \xrightarrow{t^o} 2P_2O_5$
b) $Mg + Cl_2 \xrightarrow{t^o} MgCl_2$
c) $2Na + 2H_2O \to 2NaOH + H_2$
d) $C + O_2 \xrightarrow{t^o} CO_2$
e) $C_xH_y + (x + \dfrac{y}{4})O_2 \xrightarrow{t^o} xCO_2 + \dfrac{y}{2}H_2O$
f) $2Al + Fe_2O_3 \xrightarrow{t^o} Al_2O_3 + 2Fe$
g) $2Al + 3H_2SO_4 \to Al_2(SO_4)_3 + 3H_2$
i) $Fe_xO_y + yCO \xrightarrow{t^o} xFe + yCO_2$
k) $Fe_2O_3 + 6HCl \to 2FeCl_3 +3 H_2O$
l) $3Fe + 2O_2 \xrightarrow{t^o} Fe_3O_4$
![](https://rs.olm.vn/images/avt/0.png?1311)
1. \(2Ca+O_2\underrightarrow{t^o}2CaO\)
2. \(2Na+Cl_2\underrightarrow{t^o}2NaCl\)
3. \(2Fe+3Cl_2\underrightarrow{t^o}2FeCl_3\)
4. \(Na_2O+H_2O\rightarrow2NaOH\)
5. \(2Al+3S\underrightarrow{t^o}Al_2S_3\)
6. \(2SO_2+O_2\underrightarrow{t^o}2SO_3\)
7. \(Fe+2FeCl_3\rightarrow3FeCl_2\)
8. \(FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_{2\downarrow}+2NaCl\)
9. \(Mg+2HCl\rightarrow MgCl_2+H_2\)
10. \(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)
11. \(P_2O_5+3H_2O\rightarrow2H_3PO_4\)
12. \(4P+5O_2\underrightarrow{t^o}2P_2O_5\)
13. Bạn xem lại đề câu này nhé!
14. \(H_2+\dfrac{1}{2}O_2\underrightarrow{t^o}H_2O\)
15. \(K+H_2O\rightarrow KOH+\dfrac{1}{2}H_2\)
16. \(2FeCl_2+Cl_2\underrightarrow{t^o}2FeCl_3\)
Bạn tham khảo nhé!
1, 2Ca + O2---> 2CaO
2, 2Na + Cl2---> 2NaCl
3, 2Fe + 3Cl2---> 2FeCl3
4, Na2O + H2O---> 2NaOH
5, 2Al + 3S---> Al2S3
6, 2SO2 + O2---> 2SO3
7, Fe + 2FeCl3---> 3FeCl2
8, FeCl2 + 2NaOH---> Fe(OH)2 + 2NaCl
9, Mg + 2HCl---> MgCl2 + H2
10, 2Fe(OH)3 ---> Fe2O3 + 2H2O
11, P2O5 + 3H2O---> 2H3PO4
12, 4P + 5O2---> 2P2O5
13, NaHCO3 + N2CO3---> H2O + O2 ( cái này mk nhớ là ko có, bạn kiểm tra lại xe có sai ko nhé )
14, 2H2 + O2---> 2H2O
15, 2K + 2H2O---> 2KOH + H2
16, 2FeCl2 + Cl2---> 2FeCl3
Chúc bạn học tốt!!!
![](https://rs.olm.vn/images/avt/0.png?1311)
1) 2Mg + O2 -to-➢ 2MgO
2) 2K + 2H2O → 2KOH + H2
3) 2NaOH + CuCl2 → 2NaCl + Cu(OH)2
4) 2Fe + 3Cl2 -to-➢ 2FeCl3
5) 6KOH + Al2(SO4)3 → 3K2SO4 + 2Al(OH)3
6) 3Ca(OH)2 + 2H3PO4 → Ca3(PO4)2 + 6H2O
a. 2Mg + O2 → 2MgO
b. 2Fe + 3Cl2 → 2FeCl3
c. 2NaOH + CuCl2 → Cu(OH)2 + 2NaCl
d. 2HCl + Mg → MgCl2 + H2
e. Fe2O3 + 6 HCl → 2FeCl3 + 3 H2O
f. 4Al + 3O2 → 2 Al2O3
Lập PTHH của các phản ứng sau:
a.2 Mg + O2 →2 MgO
b. 2Fe + 3Cl2 → 2FeCl3
c. 2NaOH + CuCl2 → Cu(OH)2 + 2NaCl
d. 2HCl + Mg → MgCl2 + ?
e. Fe2O3 + 6HCl → 2FeCl3 +3 H2O
f. 4Al + 3O2 → 2Al2O3