The reaction of an acid with a base is a common reaction. It is a double decomposition type of reaction in which exchange of cations and anions takes place. The acid reacts with the base to form salt and water and the reaction is termed as neutralization reaction.

Let us take the example of sodium hydroxide reacting with hydrogen chloride. The reaction is as follows:

NaOH + HCl → NaCl + H₂O

So the salt obtained is called as sodium chloride.