Download Rules for Balancing Redox Equations 1. Write

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Rules for Balancing Redox Equations
Write the skeleton equation for the reaction.
Assign oxidation numbers to all elements and determine what is being oxidized and
what is being reduced. Ignore everything else for now.
Write the electronic equations for the oxidation and reduction processes.
Adjust the coefficients in both equations so that the number of electrons lost equals
the number of electrons gained.
Place these coefficients back into the skeleton equation.
Now balance the entire equation for conservation of atoms.
Cl2 à
1.
Fe
+
2.
KOH + Cl2 à
3.
H2
4.
Cl2
5.
KI +
6.
H2S
7.
HNO3
8.
H2S + O2
9.
H2S
10
HNO3
11.
KMnO4
12.
CuS + I2
13.
As2S5
+ HNO3
14.
H2SO4
+ HI à
15.
HNO3
+ S à
16.
CrCl3
+ MnO2
17.
KMnO4
18.
HNO3
+ S à
19.
HNO3
+ H2S
20.
HNO3
+ P à
+
Cl2
FeCl3
KClO3
à
HCl
+ H2O à
Br2
+
HCl + HClO
à
KBr + I2
à
Cl2
S
à
HCl
H2O + S + NO
S + H2O
à
Br2
+
à
+ H2S
+
+ KCl + H2O
S
+ CuS à
+
HBr
NO2
+ HCl à
Cl2
+ HCl à
à
+ Cu(NO3)2
+ H2O +
SO2
+ KCl + H2O + MnCl2
S + HI +
NO2
CuCl2
+ H2O + H3AsO4
+ H2SO4
H2S + H2O + I2
NO2
+ H2SO4
+ H2O à
+ HCl + H2S
à
+ H2O
MnCl2
+ H2CrO4
KCl + MnCl2
NO + H2SO4
à
H2SO4
H3PO4
+ NO2
+ NO2
+ H2O
+ H2O
+ S + H2O