Question

Define precipitation reactions ?
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Answer 1

Explanation:

When an insoluble substance forms in an reaction, it settles down as a precipitate.

this type of reaction is precipitation reaction

I explained you, you put it in your own words if you want

In textbook words, Precipitation reaction refers to the formation of an insoluble salt when two solutions containing soluble salts are combined.

Answer 2

the chemical reaction in which an insoluble solid is found between the reaction of of chemicals or compounds are known as precipitation reaction

for example Barium Chloride and sodium sulphate gives you Barium sulphate and sodium chloride where Barium sulphate is a precipitate