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1: 2KMnO4 + 16HCl -> 2KCl + 2MnCl2 + 5Cl2 + 8H2O
2: Fe3O4 + 8HCl --> FeCl2 + 2FeCl3 + 4H2O
3: 3FexOy + 2yAl --> 3xFe + yAl2O3
4: 2FexOy + (6x-2y)H2SO4 --> xFe2(SO4)3 + (3x-2y)SO2 + (6x-2y)H2O
5: FexOy + yH2 --> xFe + yH2O
1) 2CnH2n+3nO2→2nCO2+2nH2O
2) CnH2n + 2 + \(\dfrac{3n+1}{2}\) O2 -> nCO2 + (n+1)H2O.
3) CnH2n – 2 + \(\dfrac{3n-1}{2}\) O2 -> nCO2 +(n-1) H2O.
4) CnH2n-6 +\(\dfrac{3n-3}{2}\) O2 -> nCO2 + (n-3) H2O
5) CnH2n+2O+\(\dfrac{3n}{2}\)O2→nCO2+(n+1)H2O
6) 2CxHyOz + \(\dfrac{4x+y-2z}{2}\) O2 →2x CO2 + yH2O
7) CxHyOzNt + \(\left(x+\dfrac{y}{4}\right)-\dfrac{z}{2}\)O2→xCO2+\(\dfrac{y}{2}\)H2O + \(\dfrac{t}{2}\) N2
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) \(2K+2H_2O->2KOH+H_2\)
`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`
1. \(4P+5O_2\rightarrow2P_2O_5\)
2. \(N_2+3H_2\rightarrow2NH_3\)
4. \(Fe+2HCl\rightarrow FeCl_2+H_2\)
3. \(2Al+6HCl\rightarrow2AlCl_2+H_2\)
5. \(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
6. \(Fe_3O_4+4H_2\rightarrow3Fe+4H_2O\)
7. \(2Fe+3Cl_2\rightarrow2FeCl_3\)
8. \(2Al+3S\rightarrow Al_2S_3\)
9. \(2Al_2O_3\rightarrow4Al+3O_2\)
1. 4P+5O2→2P2O5
2. N2+3H2→2NH3
4. Fe+2HCl→FeCl2+H2
3. 2Al+6HCl→2AlCl2+H2
5. Fe2O3+3H2SO4→Fe2(SO4)3+3H2O
6. Fe3O4+4H2→3Fe+4H2O
7. 2Fe+3Cl2→2FeCl3
8. 2Al+3S→Al2S3
9. 2Al2O3→4Al+3O2
Mới lớp 8 mà cân bằng electron rồi à bạn :3
a) 1:2:1:2:2
b) 1:2:1:1:2
c) 2:16:2:2:5:8
d) 10:2:8:5:1:2:8
e) 8:30:8:3:9
3nAl + (6n-4m)FexOy \(\underrightarrow{t^0}\) 6FenOm + (3n-2m)Al2O3
FeO + 2HCl => FeCl2 + H2O
xFeClx + Cl2 => xFeCl3
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