The reaction of Pb ( NO _ 3 ) _ 2 and NaCl in water produces a...

${Pb}^{2 +}$ on reaction with ${Cl}^{-}$, produces white precipitate of ${PbCl}_{2}$

${Pb}^{2 +} + 2{Cl}^{-} ⟶ {PbCl}_{2} ↓$

This precipitate is soluble in concentrated hydrochloric acid due to formation of tetrachloroplumbate $\left(II\right)$ ion

${PbCl}_{2} ↓ + 2{Cl}^{-} ⟶ {\left[{PbCl}_{4}\right]}^{2 -}$

On addition of potassium chromate (K2CrO4 ) solution to lead chloride a yellow precipitate of lead chromate is obtained.