1. P) CU +2
S -2
+ 2H+1
N+5
O -2
3 CU +2
(O -2
3)2+ S 0
+H +1
2 O -2
2(N+5
+ 2e-
N+2
)
5( S-2
+O e-
S0
)
SE OXIDAN
2 N+5
+4e-
2N+2
5S-2
+0 e-
5S0
2N+5S+4e 2N+5S
5 Cu S + 6 HNO3 5Cu(NO3)2 +2NO+5 S+H2O
R.- 2 -3
N +1
H3 +3 0
O2 3 +1
H2O -2
+2 0
N2
2(2-3
N-3e N0
2)
3(O0
2+2e 2O -2
)
4N-3
-6e 2N0
3O 0
2+ 6e 6O -2
4N -3
+3O 0
2 2N0
+6O -2
4NH3 +3O 2 6H2O + 2N2
4 N 4
12 H 12 LA ECUACION YA ESTABA BALANCEADA
6 O 6

2. H2S + Cl2 HCl + S
H2
+1
S-2
+ Cl2
0
H+1
Cl-1
+ S0
S-2
– 2e S0
Cl-0
2 + 1e 2Cl-1
2
S-2
S0
2Cl 2 4Cl2
0
s-2
+ 2Cl2
0
S0
+ 4Cl -1
2H2S + 2Cl2 4HCl + 2S
4 H 4
2 S 2
4 Cl 4

3. Srt
H2
0
+ C+2
O-2
C2
-4
H6
+1
O -2
+ H +1
2O-2
3 H2
0
– 1é H6
+1
H2
0
– 1é H2
+1
2 C+2
+ 2é C2
-2
4 H2
0
- 2é H6
+1
+ H2
+1
2 C+2
+ 2é C2
-2
2 (4H2
0
- 2é H6
+1
+ H2
+1
)
2 ( 2C+2
+ 2é 2C2
-2
)
8H2
0
– 4é 2H6
+1
+ 2H2
+1
4C+2
+ 4é 2C2
-2
8H2
0
+ 4+2
2H6
+1
+ 2H2
+1
+ 2C2
-2