# Question #921b9

$P b {\left(N {O}_{3}\right)}_{2} + C {l}^{-} = P b C {l}_{2} + N {O}_{3}^{-}$
Cl doesn't exist as single atom, it can exist as $C {l}^{-}$ that is an anion quite stable. It can react with the cations: $A {g}^{+} , H {g}_{2}^{2 +}$ and partially with $P {b}^{2 +}$ cold, to form insoluble compounds, while the salts of nitrate ion are all soluble
$P b {\left(N {O}_{3}\right)}_{2} + C {l}^{-} = P b C {l}_{2} + N {O}_{3}^{-}$
the molecule $C {l}_{2}$ instead, is a discrete oxidant, but doesn't react neither with $P {b}^{2 +}$ nor with nitrate ion