When magnesium carbonate (MgCO₃) is calcined (heated to high temperatures), it undergoes a thermal decomposition reaction. This results in the formation of magnesium oxide (MgO) and carbon dioxide (CO₂).

Here's the chemical equation for the reaction:

MgCO₃(s) → MgO(s) + CO₂(g)

Here's a breakdown of what happens:

* High Temperature: Calcination requires temperatures around 350-400°C (662-752°F).

* Decomposition: At this temperature, the chemical bonds within magnesium carbonate break down.

* Formation of Magnesium Oxide: The magnesium atoms bond with oxygen atoms to form magnesium oxide, a white powder.

* Release of Carbon Dioxide: The carbon and oxygen atoms that were previously bonded to magnesium form carbon dioxide gas, which is released into the atmosphere.

Uses of Calcination:

Calcination of magnesium carbonate has several applications:

* Production of Magnesium Oxide: Magnesium oxide is a versatile compound used in various industries, including construction (as a fire-resistant material), agriculture (as a soil amendment), and pharmaceuticals (as an antacid).

* Production of Carbon Dioxide: The carbon dioxide released during calcination can be captured and used in various industrial processes, such as the production of carbonated beverages and dry ice.

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