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This is a reaction in which the positive and negative ions of two substances in a solution are mutually interchanged.
Precipitation
In all the above reactions a white substance, which is insoluble in water, is formed. This insoluble substance formed is known as a precipitate. A reaction that produces a precipitate is called a precipitation reaction.
Neutralisation
Neutralisation is a type of double displacement reaction, in which, the reactants are a base and an acid, and the products are salt and water. The positive charge of the hydrogen ion of the acid, and the negative charge of hydroxyl ions or oxide ions of the base, lose their electrical charge, and become covalent molecule of water.
A neutralisation reaction is basically a reaction between H+ and OH- ions i.e.,
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