This is an **oxidation-reduction** (redox) reaction:

* ClVII + 8 e- → Cl-I (reduction)*

* 4 O-II - 8 e- → 4 O0 (oxidation)*

** NaClO4** is an

**oxidizing**agent,

**is a**

*NaClO4***reducing**agent.

### Word equation

* sodium perchlorate → oxygen + sodium chloride*

### Input interpretation

* NaClO4 → O2 + NaCl*

* Sodium perchlorate oxygen sodium chloride*

### Balanced equation

Balance the chemical equation algebraically:

* NaClO4 → O2 + NaCl*

Add stoichiometric coefficients, c, to the reactants and products:

* c1 NaClO4 → c2 O2 + c3 NaCl*

Set the number of atoms in the reactants equal to the number of atoms in the products for ** Cl, Na **and

*O:**Cl: c1 = c3*

*Na: c1 = c3*

*O: 4c1 = 2c2*

Since the coefficients are relative quantities and underdetermined, choose a coefficient to set arbitrarily. To keep the coefficients small, the arbitrary value is ordinarily one. For instance, set ** c1 = 1 **and solve the system of equations for the remaining coefficients:

* c1=1 c2=2 *

* c3 = 1*

Substitute the coefficients into the chemical reaction to obtain the balanced

equation:

**Answer**:

* NaClO4 → O2 + NaCl*