An acid base reaction always produces salt and water.
In neutralization reaction, an acid and a base react together to produce salt and water.
In this chemical reaction hydrogen ions (H+ ions) come form an acid while hydroxide ions (OH- ions) are released by a base which combine together to form water.
For example, let's take the reaction between sodium hydroxide and hydrochloric acid.
NaOH + HCl -------> NaCl + H2O
the above reaction produces sodium chloride salt and water.
Overall, it is a neutral reaction because no excess ions are left behind in the solution.
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