question_answer 50)

  On heating calcium carbonate gets converted into calcium oxide and carbon dioxide. (a) Is this a physical or a 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.

Answer:

  (a) The phenomena given in question is a chemical change because the composition of product formed is different from the substance taken. The reaction involved is (b) Yes When CaO dissolves in water it forms calcium hydroxide which is basic solution.  (ii) When (g) dissolves in water it forms carbonic acid which is acidic solution.