Explain by writing a word equation.
Lime stone powder disappears on adding to dilute hydrochloric acids.
Limestone is predominantly Calcium carbonate(CaCo3). When calcium carbonate reacts with 10% solution of HCl. Then Calcium chloride is formed as a salt along with water and carbon dioxide gas (brisk effervescence).
2HCl + CaCO3 → CaCl2 + CO2 + H2O
In this reaction, we add hydrogen ions (H+), which will react with the carbonate ion to form hydrogen carbonate HCO3- ions, which are soluble in water and the limestone will dissolve.