Define precipitation. - Vidyadip

Question

Define precipitation.

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Answer

Precipitation : A chemical reaction in which two compounds in their aqueous state react to form an insoluble salt as one of the product.
Acid $+$ Base $\rightarrow$ Salt $+$ Water
Example.
$\underset{\text { Barium chloride }}{\mathrm{BaCl}_2(\mathrm{aq})}+\underset{\text { Sodium sulphate }}{\mathrm{Na}_2 \mathrm{SO}_4(\mathrm{aq})} \longrightarrow \underset{\text { Barium sulphate white ppt }}{\mathrm{BaSO}_4{ }^{-}}+\underset{\text { sodium chloride }}{2 \mathrm{NaCl}(\mathrm{aq})}$

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