Amphoteric Oxide Aluminum Oxide

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Alex Nguyen 3I
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Amphoteric Oxide Aluminum Oxide

Postby Alex Nguyen 3I » Mon Nov 30, 2015 4:52 pm

Can someone explain to me how the reaction between sodium hydroxide, sodium hydroxide, and water works?
I know that aluminum oxide is acting as an acidic oxide here. It's reacting with a base, so shouldn't salt and a water form? Does this have anything to do with the water being involved as a reactant? Is the transition metal complex a salt?

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Re: Amphoteric Oxide Aluminum Oxide

Postby Chem_Mod » Mon Nov 30, 2015 9:57 pm

The product sodium tetrahydoxoaluminate is certainly a soluble salt and the (aq) designation implies the presence of water as solvent. The amphoteric aluminum oxide is not particularly soluble in water but in the presence of concentrated NaOH it can be made to act as an acid. This neutralization results in the formation of the salt of the coordination complex and some water takes part in the coordination complex chemistry.


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