Decomposition Reaction:
MgCO₃(s) → MgO(s) + CO₂(g)
Explanation:
* When magnesium carbonate is heated, it undergoes a thermal decomposition reaction.
* The heat energy from the Bunsen burner provides enough activation energy for the reaction to occur.
* The magnesium carbonate breaks down into magnesium oxide (MgO) and carbon dioxide gas (CO₂).
* The carbon dioxide gas is released as bubbles, and the solid magnesium oxide remains as a white residue.
Observations:
* The solid magnesium carbonate will change color from white to a grayish-white.
* You will observe the release of a colorless gas (carbon dioxide).
* The reaction is exothermic, meaning it releases heat.
Note:
The decomposition temperature of magnesium carbonate is around 350°C. A Bunsen burner flame can reach temperatures of around 1000°C, so it is sufficient to decompose the compound.
