Question

Double displacement reactions are also known as precipitation reactions. Why?

Answer 1

A double displacement reaction, also known as a double replacement reaction or metathesis reaction, is a type of reaction that occurs when the cations and anions switch between two reactants to form new products. ... A precipitation reaction forms an insoluble solid compound.

Answer 2

Double displacement reaction are sometimes also called precipitation reaction because one reactant displaces the ions of another reactant, which may lead to precipitation of products...

Eg: Na2SO4 + BaCl2 -----> BaSO4(precipitate) + NaCl