# The reaction 2Na + Cl_2 -> 2NaCl is an example of which type of reaction?

Jan 28, 2017

See explanation.

#### Explanation:

The reaction you have here

$2 {\text{Na"_ ((s)) + "Cl"_ (2(g)) -> 2"NaCl}}_{\left(s\right)}$

is an example of a synthesis reaction.

In your case, sodium metal, $\text{Na}$, reacts with chlorine gas, ${\text{Cl}}_{2}$, to form sodium chloride, $\text{NaCl}$.

You can also say that the reaction given to you is an example of a redox reaction.

$2 {\stackrel{\textcolor{b l u e}{0}}{\text{Na") _ ((s)) + stackrel(color(blue)(0))("Cl") _ (2(g)) -> 2 stackrel(color(blue)(+1))("Na") stackrel(color(blue)(-1))("Cl}}}_{\left(s\right)}$

The oxidation number of sodium increases from $\textcolor{b l u e}{0}$ on the reactants' side to $\textcolor{b l u e}{+ 1}$ on the products' side, which means that sodium is being oxidized.

On the other hand, the oxidation number of chlorine decreases from $\textcolor{b l u e}{0}$ on the reactants' side to $\textcolor{b l u e}{- 1}$ on the products' side, which means that chlorine is being reduced.