Question

what happens to an acid or a base in water solution explain with an activity

Answer 1

acid releases H+ in water while bases releases OH - in water

Answer 2

Acids in water solution dissociates H+ ions. Let us consider the reaction between water and hydrochloric acid (HCl).  HCl in presence of water produces H+ ion. This ion cannot exist alone and hence combines with water molecules and forms H3O+. The reaction is as follows:



Base when dissolved in water produces OH- ion. Let us consider the reaction between water and sodium hydroxide NaOH. NaOH in presence of water produces OH- ion.



Therefore the neutralisation stands out as follows: