Fe + H2SO4 ---> Fe2(SO4)3 + SO2+H2O
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Cân bằng các phương trình sao
1. 2FeCO3 + 4H2SO4 → Fe2(SO4)3 + SO2 + 2CO2 + 4H2O
2. 2FeSO4 + 2H2SO4 → Fe2(SO4)3 + SO2 + 2H2O
3. 2Fe(OH)2 + 4H2SO4 → Fe2(SO4)3 + SO2 + 6H2O
4. 3Fe(NO2)2 + 8HNO3 → 3Fe(NO3)3 + 5NO + 4H2O
5. K2Cr2O7 + 14HCl → 2KCl + 2CrCl3 + 3Cl2 + 7H2O
6. KClO3 + 6HCl → 3Cl2 + KCl + 3H2O
7. 3KNO3+ 2Al → 3KNO2 + Al2O3
8. 2KClO3 + 3S → 2KCl + 3SO2
9. 5SO2 + 2KMNO4 + 2H2O → 2MNSO4 + K2SO4 + 2H2SO4
10. 6FeSO4 + K2Cr2O7 + 7H2SO4 → 3Fe2(SO4)3 + Cr2(SO4)3 + K2SO4 + 7H2O
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1.
2Fe+2 ---> 2Fe+3 + 1e | x1 |
S+6 + 2e ---> S+4 | x1 |
2FeO + 4H2SO4 ---> Fe2(SO4)3 + SO2 + 4H2O
2.
2Fe+2 ---> 2Fe+3 + 2e | x1 |
S+6 + 2e ---> S+4 | x1 |
2FeCO3 + 4H2SO4 ---> Fe2(SO4)3 + 2CO2 + SO2 + 4H2O
3.
2Fe+2 ---> 2Fe+3 + 2e | x1 |
S+6 + 2e ---> S+4 | x1 |
2FeSO4 + 2H2SO4 ---> Fe2(SO4)3 + SO2 + 2H2O
4.
2Fe+2 ---> 2Fe+3 + 2e | x4 |
S+6 + 8e ---> S-2 | x1 |
8Fe(OH)2 + 13H2SO4 ---> 4Fe2(SO4)3 + H2S + 20H2O
5.
Al0 ---> Al+3 + 3e | x10 |
2N+5 ---> 2N0 | x3 |
10Al + 36HNO3 ---> 10Al(NO3)3 + 3N2 + 18H2O
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ko bt là có phải trình bày ko phải thì bảo mình trình bày nha
3 - 8 - 3 - 2 - 4
2 - 4 - 1 - 1 - 4
2 - 10 - 3 - 1 - 10
2 - 10 - 8 - 5 - 1 - 2 - 8
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\(2Fe+6H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O+3SO_2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
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2Fe(OH)2 + 4H2SO4 ---> Fe2(SO4)3 + SO2 + 6H2O
4Cu2O + 18HNO3 ---> 8Cu(NO3)2 + NH4NO3 + 7H2O
4FexOy + (12x-4y) H2SO4 ---> 2x Fe2(SO4)3 + (6x-4y) SO2 + (12x-4y) H2O
FexOy + (4x-2y) HNO3 ---> x Fe(NO3)2 + (2x-2y) NO2 + (2x-y) H2O
(5t-2z) FexOy + (18xt - 2yt - 6xz) HNO3---> (5tx-2zx) Fe(NO3)3 + (3x-2y) NtOz + (9xt-yt-3xz) H2O
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\(a,4Mg+10HNO_3\to 4Mg(NO_3)_2+NH_4NO_3\uparrow+3H_2O\\ b,2Fe_xO_y+(6x-2y)H_2SO_4\to xFe_2(SO_4)_3+(3x-2y)SO_2\uparrow+(6x-2y)H_2O\\ c,3Fe_xO_y+(12x-2y)HNO_3\to 3xFe(NO_3)_3+(3x-2y)NO\uparrow+(6x-y)H_2O\\ d,2FeO+4H_2SO_4\to Fe_2(SO_4)_3+SO_2\uparrow+4H_2O\\ e,3Fe_3O_4+28HNO_3\to 9Fe(NO_3)_3+NO\uparrow+14H_2O\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(Fe_xO_y+yH_2\underrightarrow{^{^{t^0}}}xFe+yH_2O\)
\(Fe_xO_y+2yHCl\underrightarrow{^{^{t^0}}}xFeCl_{\dfrac{2y}{x}}+yH_2O\)
\(2Fe_xO_y+3yH_2SO_4\rightarrow xFe_2\left(SO_4\right)_3+3yH_2O\)
\(2M+2nH_2SO_4\rightarrow M_2\left(SO_4\right)_n+nSO_2+2nH_2O\)
\(3M+4nHNO_3\rightarrow3M\left(NO_3\right)_n+nNO+2nH_2O\)
Đề câu này hơi sai sai !
2Fe + 6H2SO4 (đ) -to-> Fe2(SO4)3 + 3SO2 + 6H2O