On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
Ans. Chemical change
(b) Can you prepare one acidic and one basic solution by using the products formed in
the above process? If so, write the chemical equation involved.
Ans. Acidic and basic solutions can be prepared by dissolving the products of the above
process in water
CaO + H2O → Ca(OH)2 (basic solution)
CO2 + H2O → H2CO3 (acidic solution)
