When ammonium phosphate (NH₄)₃PO₄ is put into water, it dissolves and dissociates into its ions:

(NH₄)₃PO₄(s) → 3 NH₄⁺(aq) + PO₄³⁻(aq)

Here's what happens:

* (NH₄)₃PO₄(s): Solid ammonium phosphate

* NH₄⁺(aq): Ammonium ions in aqueous solution (dissolved in water)

* PO₄³⁻(aq): Phosphate ions in aqueous solution (dissolved in water)

This reaction is an example of a dissociation reaction, where an ionic compound breaks apart into its constituent ions when dissolved in water.