Here's why:
* Limestone is primarily composed of calcium carbonate (CaCO3).
* When hydrochloric acid (HCl) comes into contact with calcium carbonate, a chemical reaction occurs, producing carbon dioxide gas (CO2), water (H2O), and calcium chloride (CaCl2).
* The reaction is evident by the bubbling and fizzing that occurs as the carbon dioxide gas is released.
Other sedimentary rocks, like sandstone and shale, do not react with hydrochloric acid because they do not contain significant amounts of carbonates.
