Ecuaciones
- 2. • FeCl2 + Cl2 -> FeCl3
2+ 2-=0
0
3+3-=0
FeCl2 + Cl2 -> FeCl3
Fe2 -1e ->Fe3+
Cl2 + 1e -> Cl3
6Fe2+- 1e -> Fe3+
3Cl2 + 6e -> 2Cl3
__________________________
6 Fe2+ -2e -> 6Fe3+
1-
3Cl0 + 2e -> 2Cl3__________________________
1-
6Fe+3Cl -> 6Fe3+2Cl3
6 -Fe- 6
18 -Cl- 18
6FeCl2 + 3Cl2 -> 6FeCl3
- 3. • K + H2O -> KOH + H2
0
1+2-
1+2-1+
0
K + H2O -> KOH + H2
2(K0 -1e -> K1+)
1(H2 +2e -> H2)
2-K-2
2-O-2
4-H-4
2K0 -2e -> 2K1+
H2 +2e -> H2
_____________
2K0+H2 -> 2K1+ +H2
- 4. • H2SO4 + HI -> I2 + H2S + H2O
1+ 6+ 2-
1+ 1-
0
1+ 2-
1+ 2-
H2SO4 + HI -> I2 + H2S + H2O
2(S6++8e -> S2-)
8(2I1- -2e -> I2)
____________
2S6++16e ->2S216I1- -16e ->8I2
____________
2S6+ +16I+ -> 2S2- +8I2
16-I-16
2-S-2
8-O-8
20-H-20
- 5. • Zn + S -> ZnS
0
0
2+ 2-
Zn + S -> ZnS
2(Zn0 -2e -> Zn2+)
2(S0 +2e ->S2-)
_______________
2 Zn0 -4e -> 2Zn2+
2 S0 + 4e -> 2S2-)
_______________
2Zn0 + 2S0 -> 2Zn + 2S2-
- 6. • I2 + KOH -> KIO3 + KI + H2O
0
1+ 2- 1+
1+ 5+ 2-
1+ 1-
1+2-
I2 + KOH -> KIO3 + KI + H2O
I2-5e -> I5+
I2 +1e -> I12(I210e -> 2I5+)
10(I2 +2E -> 2I1-)
_____________
2I0 – 20e -> 4I5+
10I2 + 20e -> 20I1_______________
2 I2 +10I2 -> 4I5+ + 20I124-I-24
24-K-24
24-O-24
24-H-24
- 7. • Ag + H2O -> Ag2S + H2
0
1+ 2-
1+ 2-
0
Ag + H2O -> Ag2S + H2
2(Ag0 -2e -> Ag2)
2(H2 +2e -> H2)
______________
4Ag0 -4e ->2Ag2
2H2 +4e -> 2H2
_____________
4Ag0 +2H2 -> 2Ag2 + 2H2
4-Ag-4
2-S-2
4-H-4
- 8. • Cu + H2SO4 ->CuSO4 + H2O + SO2
0
2+6+8-=0
2+6+8-=0
1+2-
4+2-
Cu + H2SO4 ->CuSO4 + H2O + SO2
2(Cu0 -2e -> Cu2+)
2(S6+ +2e -> S4+)
________________
2Cu0 +4e -> 2Cu2+
2S6+ +4e -> 2S4+
________________
Cu0 + S6+ -> Cu2+ S4+
1-Cu-1
2-S-2
8-O-8
4-H-4
- 9. • Fe2O3 + CO -> Fe + CO2
3+ 2-
2+2-
0
4+2-
Fe2O3 + CO -> Fe + CO2
2(Fe2 3+ +6e -> 2Fe0)
6(C2+ -2e -> C4+)
________________
2Fe2 3+ +12e -> 4Fe0
6C2+ -12e -> 6C4+
__________________
2Fe2 3+ +6C2+ -> 4 Fe0 + 6c4+
4-F-4
6-C-6
12-O-12
- 10. • MgSO4 + H2 -> Mg + H2SO4
2+ 6+ 8-
0
0
2+6+8-
MgSO4 + H2 -> Mg + H2SO4
Mg2+ +2e -> Mg0 -> agente oxidante
H2 0 -2e -> H2 1+ -> agente reductor
______________
Mg2+ +H2 -> Mg0 + H2 1+
1-Mg-1
1-S-1
4-O-4
2-H-2
- 11. • P + HNO3 + H2O -> NO + H3PO4
0
1+5+6-
1+2-
2+2-
3+5+8-
P + HNO3 + H2O -> NO + H3PO4
3(P0 -5e -> P5+)
5(N5+ +3e -> N2+)
_______________
3P0 -15e -> P5+
5N5+ +15e ->5N2+
_______________
3P0 +5N5+ ->3P5+ +5N2+
3-P-3
5-N-5
17-O-17
9-H-9
- 12. • Al + H2SO4 -> Al2(SO4)3 + H2
0
1+ 6+ 2-
3+ 6+ 2-
0
Al + H2SO4 -> Al2(SO4)3 + H2
2(2Al0 -6e -> Al 2 3+)
6(H2 1+ +2e -> H2 0)
__________________
4Al0 -12e -> 2Al 2 3+
6H2 1+ +12e -> 6H2
__________________
4Al + 6H2 -> 2Al2 6H2
4-Al-4
6-S-6
24-O-24
12-H-12
