Common Aluminate Ions:
* AlO₂⁻ (Aluminate(III) ion): This is the most common aluminate ion, with a valency of -1. It is formed by the reaction of aluminum oxide (Al₂O₃) with a base.
* AlO₄⁵⁻ (Tetrahydroxoaluminate(III) ion): This ion has a valency of -5. It is formed in basic solutions and is often used in the production of aluminum.
Formula of Aluminates:
The formula of aluminates depends on the charge of the aluminate ion and the counterion. For example:
* Sodium aluminate (NaAlO₂): Sodium ion (Na⁺) combines with the aluminate(III) ion (AlO₂⁻) to form this compound.
* Potassium tetrahydroxoaluminate(III) (K[Al(OH)₄]): Potassium ion (K⁺) combines with the tetrahydroxoaluminate(III) ion (AlO₄⁵⁻) to form this compound.
Important Note: The valency of aluminate can vary depending on the specific compound.
To determine the exact formula and valency of aluminate in a particular compound, you need to know the charge of the counterion and the overall charge of the compound.
