Final answer:
The product formed when the aluminate ion reacts with aqueous ammonia is Al(NH3)4²⁻ (option C). In this reaction, the Al³+ ion and NH3 exchange their ligands, resulting in the formation of the complex ion Al(NH3)4²⁻.
Step-by-step explanation:
The product formed when the aluminate ion reacts with aqueous ammonia is Al(NH3)4²⁻, option C.
In the reaction of ammonia with water, ammonia acts as a base and accepts a proton from a water molecule, which means that water acts as an acid. In the reverse reaction, an ammonium ion donates a proton to a hydroxide ion, and the hydroxide ion acts as a base.
When the aluminate ion reacts with aqueous ammonia, the Al³+ ion and NH3 exchange their ligands, resulting in the formation of the complex ion Al(NH3)4²⁻.
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