Some white magnesium carbonate powder is heated strongly in a test tube. The gas given off is bubbled through limewater. The chemical equation for the reaction occurring in the heated tube is:
MgCO3(s)→MgO(s)+CO2(g) \text{MgCO}_3(\text{s}) \rightarrow \text{MgO}(\text{s}) + \text{CO}_2(\text{g}) MgCO3(s)→MgO(s)+CO2(g)What type of chemical reaction is taking place when magnesium carbonate is heated?
State the appearance of the limewater before and after the gas was bubbled through it.
The Taj Mahal in India is a famous historic monument made largely of white marble, which is a form of calcium carbonate. The pristine appearance of the marble has deteriorated over the years due to the presence of sulfur dioxide in the atmosphere from industrial emissions.
Describe how sulfur dioxide causes this deterioration of the marble.
