# What happens when aqueous solutions of calcium chloride and of sodium carbonate are mixed?

##### 1 Answer
Oct 19, 2015

A double replacement reaction takes place.

#### Explanation:

Calcium chloride, ${\text{CaCl}}_{2}$, a soluble ionic compound, and sodium carbonate, ${\text{Na"_2"CO}}_{3}$, also a soluble ionic compound, will react to form calcium carbonate, ${\text{CaCO}}_{3}$, an insoluble solid that precipitates out of solution, and sodium chloride, another soluble ionic compound.

The balanced chemical equation for this double replacement reaction looks like this

${\text{CaCl"_text(2(aq]) + "Na"_2"CO"_text(3(aq]) -> "CaCO"_text(3(s]) darr + 2"NaCl}}_{\textrm{\left(a q\right]}}$

Once you mix the two aqueous solutions, a white insoluble solid, calcium carbonate, will precipitate out of solution.

The net ionic equation for this reaction looks like this

${\text{Ca"_text((aq])^(2+) + "CO"_text(3(aq])^(2-) -> "CaCO}}_{\textrm{3 \left(s\right]}} \downarrow$