Cân bằng PTHH bằng phương pháp đại số
Al + \(H_2SO_4\) --> \(Al_2\left(SO_4\right)_3+SO_2+H_2O\)
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
`Fe + 2HCl -> FeCl_2 + H_2`
`2Na + 2HCl -> 2NaCl + H_2`
`2Al + 6HCl -> 2AlCl_3 + 3H_2`
`2Al(OH)_3 + 3H_2SO_4 -> Al_2(SO_4)_3 + 6H_2O`
![](https://rs.olm.vn/images/avt/0.png?1311)
2Al + 6H2SO4 → Al2(SO4)3 + 6H2O
(5x-2y) Al + (18x-6y) HNO3 → (5x-2y) Al(NO3)2 + 3NxOy + (9x-3y) H2O
2M + 2n H2SO4 → M2(SO4)n + nSO2 +2n H2O
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(K_2O+H_2O->2KOH\)
b) \(2Fe+3Cl_2->2FeCl_3\)
c) \(2Al\left(OH\right)_3+3H_2SO_4->Al_2\left(SO_4\right)_3+6H_2O\)
d) \(4FeS_2+11O_2->2Fe_2O_3+8SO_2\)
e)\(2Al+6HCl->2AlCl_3+3H_2\)
f) \(2KClO_3->KCl+3O_2\)
g) \(4P+5O_2->2P_2O_5\)
h) \(3Fe+2O_2->Fe_3O_4\)
i) \(2Al+3CuSO_4->Al_2\left(SO_4\right)_3+3Cu\)
j) \(2K+2H_2O->2KOH+H_2\)
![](https://rs.olm.vn/images/avt/0.png?1311)
$\rm u)S + 2HNO_3 \rightarrow H_2SO_4 + 2NO \uparrow$
$\rm v)3Ba(NO_3)_2 + Al_2(SO_4)_3 \rightarrow 3BaSO_4 \downarrow + 2Al(NO_3)_3$
$\rm w)3Ba(OH)_2 + P_2O_5 \rightarrow Ba_3(PO_4)_3 \downarrow + 3H_2O$
$\rm x)2Fe_2O_3 + 3C \xrightarrow{t^o} 4Fe + 3CO_2 \uparrow$
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 2Al+ 3H2SO4-> Al2(SO4)3+3H2
b) 2Fe(OH)3+ 3H2SO4-> Fe2(SO4)3+ 6H2O
a) 2Al + 3H2SO4 \(\rightarrow\) Al2(SO4)3 + 3H2
b) 2Fe(OH)3 + 3H2SO4 \(\rightarrow\) Fe2(SO4)3 + 6H2O
![](https://rs.olm.vn/images/avt/0.png?1311)
2Al + 6H2SO4 → Al2(SO4)3 + 3SO2 + 6H2O
CaCO3 \(\underrightarrow{to}\) CaO + CO2
2Al(OH)3 \(\underrightarrow{to}\) Al2O3 + 3H2O
3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O
4P + 5O2 \(\underrightarrow{to}\) 2P2O5
2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
2AlCl3 + 3Ba(OH)2 → 3BaCl2 + 2Al(OH)3
2Na3PO4 + 3CaCl2 → 6NaCl + Ca3(PO4)2
![](https://rs.olm.vn/images/avt/0.png?1311)
2Al +6 H2SO4 -->Al2(SO4)3+3SO2+6H2O
2Al + 6H2SO4 --> Al2(SO4)3 + 3SO2 + 6H2O