The reaction between hydrochloric acid and marble (calcium carbonate).
Carrara marble (calcium carbonate) and hydrochloric acid.
Let's pour hydrochloric acid on the marble.
The marble is attacked. A colourless gas is produced.
A flame is approached.
The gas extinguishes the flame. It is carbon dioxide.
$Ca^{2+}CO_3^{2-}$ $ +$ $2H^+$ $ +$ $2Cl^-$ $ \longrightarrow$ $ H_2O$ $ +$ $ CO_2 $ $+ $ $Ca^{2+}$ $ +$ $2Cl^-$
Carrara marble (calcium carbonate) and hydrochloric acid.
