What happens when dilute hydrochloric acid is added to sodium carbonate? write a balanced chemical equation of the reaction involved.

19 While diluting an acid, why is it recommended that the acid should be added to water and not water to the acid? 20 What happens when an acid reacts with a metal hydrochloric acid is added to sodium carbonate? Write equation of the reaction which takes place. 21 Which gas is liberated when dilute hydrochloric acid reacts with sodium carbonate? How will you test for the presence of this gas? 22 What happens when an acid reacts with a base? Explain by taking the example of hydrochloric acid and sodium hydroxide. Give equation of the chemical reaction which takes place. What is the special name of such a reaction?