Answer :
Acid--alkali neutralization reactions occur when an acid is mixed with an alkali in equal proportions.
A base or alkali is a substance that reacts with an acid to produce salt and water. Bases that are dissolved in water are called alkalis. For example sodium hydroxide is a base as well as alkali because it dissolves in water.
The amount of acid needed for neutralization will be equal to the amount of base. It means that equivalent amount of acid and base is needed for neutralization process. N part of acid will always neutralize N part of base.
Acid is a substance that gives H⁺ ions and base is a substance that gives OH⁻ ions and both of them unite to give water.
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