When ammonium sulfate ((NH₄)₂SO₄) is added to an hydroxide (OH⁻), a neutralization reaction occurs.

Here's what happens:

* Ammonium ions (NH₄⁺) react with hydroxide ions (OH⁻) to form ammonia (NH₃) and water (H₂O):

NH₄⁺ + OH⁻ → NH₃ + H₂O

* Sulfate ions (SO₄²⁻) remain in solution.

The overall reaction can be represented as:

(NH₄)₂SO₄ + 2OH⁻ → 2NH₃ + 2H₂O + SO₄²⁻

Important points:

* The reaction is exothermic, meaning it releases heat.

* The ammonia produced is a weak base, so the solution will become slightly basic.

* The type of hydroxide used will determine the specific products and the overall reaction. For example, if you use sodium hydroxide (NaOH), the products will be sodium sulfate (Na₂SO₄) and ammonia.

Examples:

* Ammonium sulfate + potassium hydroxide:

(NH₄)₂SO₄ + 2KOH → 2NH₃ + 2H₂O + K₂SO₄

* Ammonium sulfate + calcium hydroxide:

(NH₄)₂SO₄ + Ca(OH)₂ → 2NH₃ + 2H₂O + CaSO₄

Note: The specific products and reaction conditions may vary depending on the concentration of the reactants and the presence of other ions in the solution.