1. Understanding the Reactants
* Ammonium Phosphate (NH₄)₃PO₄: A salt containing ammonium ions (NH₄⁺) and phosphate ions (PO₄³⁻).
* Lithium Hydroxide (LiOH): A strong base containing lithium ions (Li⁺) and hydroxide ions (OH⁻).
2. The Reaction
The reaction between ammonium phosphate and lithium hydroxide is a double displacement reaction, where the ions switch partners.
(NH₄)₃PO₄ (aq) + 3LiOH (aq) → 3NH₃ (aq) + 3H₂O (l) + Li₃PO₄ (aq)
3. Explanation of the Products
* Ammonia (NH₃): A weak base, formed by the combination of ammonium ions from ammonium phosphate and hydroxide ions from lithium hydroxide.
* Water (H₂O): A neutral compound formed by the reaction of hydrogen ions (H⁺) from ammonium ions and hydroxide ions (OH⁻).
* Lithium Phosphate (Li₃PO₄): A soluble salt formed by the combination of lithium ions and phosphate ions.
4. The Instability of Ammonium Hydroxide (NH₄OH)
Ammonium hydroxide is a hypothetical compound that doesn't exist as a stable molecule in solution. Instead, it exists in equilibrium with ammonia and water:
NH₃ (aq) + H₂O (l) ⇌ NH₄⁺ (aq) + OH⁻ (aq)
The equilibrium strongly favors the formation of ammonia and water. This means that, in solution, ammonium hydroxide rapidly decomposes into ammonia and water.
Key Points
* The reaction between ammonium phosphate and lithium hydroxide generates ammonia, water, and lithium phosphate.
* The ammonia produced is a result of the decomposition of ammonium hydroxide, which is unstable in solution.
* The reaction is an example of a double displacement reaction.
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