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

* 6* **C**-II - *24* **e**- → *6* **C**II *(oxidation)*

* 12* **O**0 + *24* **e**- → *12* **O**-II *(reduction)*

** C6H12** is a

**reducing**agent,

*O2*is an

**oxidizing**agent.

### Word equation

* cyclohexane + oxygen → carbon monoxide + water*

### Input interpretation

* C6H12 + O2 → CO + H2O*

* Cyclohexane oxygen carbon monoxide water*

### Balanced equation

Balance the chemical equation algebraically:

* C6H12 + O2 → CO + H2O*

Add stoichiometric coefficients, ** c1**, to the reactants and products:

* c1C6H12 + c2 O2 → c3 CO + c4 H2O*

Set the number of atoms in the reactants equal to the number of atoms in the products for ** C, H **and

*O:**C: 6c1 = c3*

*H: 12c1 = 2c4*

*O: 2c2 = c3 + c4*

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=6*

*c3=6*

*c4=6*

Substitute the coefficients into the chemical reaction to obtain the balanced

equation:

**Answer**:

* C6H12 + O2 → CO + H2O*