Question

Calcium carbonate decomposes when heated at about ________________.

Answer 1

• Decomposition reactions are processes in which chemical species break up into simpler parts.
• Calcium carbonate (${\mathrm{CaCO}}_3$) decomposes when heated at about $100°\mathrm{C}$
• Decomposition of Calcium carbonate(${\mathrm{CaCO}}_3$) leads to the formation of Calcium oxide ($\mathrm{CaO}$) and Carbon dioxide(${\mathrm{CO}}_2$).
• Chemical equation:

$\underset{\mathrm{Calcium}\mathrm{carbonate}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)}\underset{}{\overset{100°\mathrm{C}}{\to }}\underset{\mathrm{Calcium}\mathrm{oxide}}{\mathrm{CaO}\left(\mathrm{s}\right)}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}$

So, Calcium carbonate decomposes when heated at about $100°\mathrm{C}$.