Write a balanced chemical reaction where the natural mixing of two colorless aqueous solutions produces a yellow precipitate.

Precipitation reaction:

1. A precipitate is an insoluble solid which is obtained by the process of a precipitation reaction.
2. A precipitation reaction is a reaction that takes place in an aqueous solution in which cations and anions are combined to form an insoluble solid which is termed a precipitate.

Few examples of a precipitation reaction:

1 $\underset{(Coppersuphate)}{\underbrace{CuS{O}_4\left(aq\right)}}+\underset{(Sodiumhydroxide)}{\underbrace{2NaOH\left(aq\right)}}\to \underset{(Sodiumsulphate)}{\underbrace{N{a}_{2}S{O}_4\left(s\right)}}+\underset{\underset{Precipitate}{\underbrace{(Copperhydroxide)}}}{\underbrace{Cu{\left(OH\right)}_2}}\downarrow$

2.$\underset{(Leadnitrate)}{\underbrace{Pb{\left(N{O}_3\right)}_2\left(aq\right)}}+\underset{(SodiumIodide)}{\underbrace{2NaI\left(aq\right)}}\to \underset{\underset{\left(Precipitate\right)}{\underbrace{(Leadiodide)}}}{\underbrace{Pb{I}_2\left(s\right)}}\downarrow +\underset{(Sodiumnitrate)}{\underbrace{2NaN{O}_3\left(aq\right)}}$

Few yellow precipitates are:

1. Lead iodide $\left(Pb{I}_2\right)$, Silver bromide$\left(AgBr\right)$, Cadmium sulphide $\left(CdS\right)$.
2. The chemical reaction in which the mixing of two colorless aqueous solutions produces a yellow precipitate is as follows:

$\underset{(Leadnitrate)}{\underbrace{Pb{\left(N{O}_3\right)}_2\left(aq\right)}}+\underset{(Potassiumiodide)}{\underbrace{2KI\left(aq\right)}}\to \underset{\underset{(YellowPrecipitate)}{\underbrace{(LeadIodide)}}}{\underbrace{Pb{I}_2\left(s\right)}}+\underset{(Potassiumnitrate)}{\underbrace{KN{O}_3\left(aq\right)}}$

Here $\left(Pb{I}_2\right)$ is a yellow-colored precipitate.