You're asking about the reaction between ammonium iodide (NH₄I) and silver nitrate (AgNO₃). This reaction results in a precipitation reaction, where a solid (precipitate) forms.

Here's the balanced chemical equation:

NH₄I (aq) + AgNO₃ (aq) → AgI (s) + NH₄NO₃ (aq)

Explanation:

* NH₄I (aq): Ammonium iodide, dissolved in water (aqueous solution).

* AgNO₃ (aq): Silver nitrate, dissolved in water.

* AgI (s): Silver iodide, a yellow precipitate that forms as a solid.

* NH₄NO₃ (aq): Ammonium nitrate, which remains dissolved in water.

Key points:

* Double Displacement: The reaction involves the exchange of ions between the reactants.

* Precipitate: Silver iodide (AgI) is insoluble in water, hence it forms a solid precipitate.

* Solubility Rules: Understanding solubility rules helps predict the formation of precipitates in reactions.

Let me know if you'd like more details about precipitation reactions or solubility rules!