Final answer:
Lead nitrate solution reacts with sodium iodide solution to form solid lead iodide and sodium nitrate solution, as represented by the balanced chemical equation Pb(NO3)2 (aq) + 2 NaI (aq) → PbI2 (s) + 2 NaNO3 (aq).
Step-by-step explanation:
When a solution of lead nitrate is mixed with a solution of sodium iodide, a chemical reaction occurs resulting in the formation of solid lead iodide and a solution of sodium nitrate. The balanced chemical equation representing this reaction is:
Pb(NO3)2 (aq) + 2 NaI (aq) → PbI2 (s) + 2 NaNO3 (aq)
In this equation, (aq) denotes that the substances are in aqueous solution, while (s) indicates that lead iodide is a solid precipitate. This reaction is an example of a precipitation reaction, where the insoluble solid (precipitate) settles out of the liquid mixture, indicating a chemical change.