# What are oxidation and reduction reactions? Give an example of each.

Sep 7, 2016

$\text{Loss of electrons}$ $\equiv$ $\text{OXIDATION}$

$\text{Gain of electrons}$ $\equiv$ $\text{REDUCTION}$

#### Explanation:

And thus redox reactions are largely hypothetical processes; mind you they do allow representation of the stoichiometries of actual chemical reactions:

$N a \rightarrow N {a}^{+} + {e}^{-}$ $\text{Oxidation (i)}$

$\frac{1}{2} {O}_{2} + 2 {e}^{-} \rightarrow {O}^{2 -}$ $\text{Reduction (ii)}$

And $2 \times \left(i\right) + \left(i i\right)$ $=$

$2 N a + \frac{1}{2} {O}_{2} \rightarrow N {a}_{2} O$

Has the metal been reduced or oxidized? Has oxygen been oxidized or reduced? How will you cope?