What happens to

(a) the H⁺ ions, and

(b) temperature of the solution, when an acid is neutralized?

49 A substance X which is used as an antacid reacts with dilute hydrochloric acid to produce a gas Y which is used in one type of fire-extinguisher. Name the substance X and gas Y. Write a balanced equation for the chemical reaction which takes place. 50 How is the neutralization of a carbonate with an acid different from the neutralization of an oxide or a hydroxide? 1 Name the gas evolved when zinc granules are treated/heated with:

(a) hydrochloric acid solution

(b) sodiumhydroxide solution

2 What is the common name of water soluble bases?