Question 5

Describe the process of neutralisation with the help of an example.


NEUTRALISATION: When an acid is mixed with a base, they neutralise the effect of each other. The products formed on mixing an acid and a base are salt and water. The reaction between acid and base which produces salt and water with the evolution or release of heat is known as neutralization reaction.

Acid + Base → Salt + Water + Heat (released)

In a neutralisation reaction, salt are formed which is neutral by nature. The salt formed during a neutralisation reaction depends on which acid and which base are reacted with each other. For example: Sodium hydroxide is a base and hydrochloric acid is an acid. So, when sodium hydroxide is treated with hydrochloric acid, then a neutralisation reaction takes place to form sodium chloride (salt) and water.

Sodium hydroxide + Hydrochloric acid → Sodium chloride + Water
         (NaOH)                  (HCl)                           (NaCl)        (H2O)

The salt formed in this neutralisation reaction of sodium hydroxide and hydrochloric acid is sodium chloride (NaCl). It is known as common salt.

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