When Silver Nitrate (AgNO3) and Lead Nitrate (Pb(NO3)2) are mixed, a precipitation reaction takes place, resulting in the formation of a white precipitate. The precipitate formed is Lead Chloride (PbCl2).

The reaction can be represented as follows:

2AgNO3 (aq) + Pb(NO3)2 (aq) -> 2PbCl2 (s) + 2NaNO3 (aq)

In this reaction, the silver ions (Ag+) from Silver Nitrate combine with the chloride ions (Cl-) from Lead Nitrate to form insoluble Lead Chloride. The lead ions (Pb2+) and nitrate ions (NO3-) remain in the solution as soluble sodium nitrate.

The formation of Lead Chloride as a precipitate can be observed as a white, cloudy suspension in the reaction mixture. This precipitate can be separated from the solution by filtration, leaving behind a clear liquid containing sodium nitrate.