Final answer:
The net ionic equation for the acid-base hydrolysis equilibrium of ammonium iodide in water is H3O+ + I- ↔ HI + H2O.
Step-by-step explanation:
The hydrolysis equilibrium that is established when ammonium iodide (NH4I) is dissolved in water can be represented by the following net ionic equation:
H3O+ + I- ↔ HI + H2O
In this reaction, the ammonium ion (NH4+) reacts with water to form hydronium ions (H3O+) and iodide ions (I-). The hydronium ions then react with iodide ions to form hydrogen iodide (HI) and water. This reaction represents the acid-base hydrolysis equilibrium for ammonium iodide in water.