# Question #be1e2

May 2, 2017

Magnesium carbonate will release the greatest volume of carbon dioxide.

#### Explanation:

The carbonates are all 1:1 salts with the general formula ${\text{MCO}}_{3}$.

They react with sulfuric acid per the equation

${\text{MCO"_3 + "H"_2"SO"_4 → "MSO"_4 + "H"_2"O" + "CO}}_{2}$

Thus, 1 mol of each carbonate produces 1 mol of carbon dioxide.

However, ${\text{PbSO"_4, "CaSO}}_{4}$, and ${\text{BaSO}}_{4}$ are all insoluble.

As the carbonates react with the sulfuric acid, the sulfate precipitates will form a coating on the surface of the carbonate and prevent further access of the acid.

${\text{MgSO}}_{4}$ is soluble, so it will not coat the carbonate.

Hence, ${\text{MgCO}}_{3}$ will produce the most carbon dioxide.