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Which consequence results when excess hydroxide reacts with aluminum?

A)Formation of tetrahydroxoaluminate(III) ions
B)Precipitation of aluminum(II) hydroxide
C)Passivation by aluminum oxide formation
D)Electrolysis of molecular water ensues

💡 Explanation

Tetrahydroxoaluminate(III) complex ions form because of hydroxide's ionic interactions modifying coordination sphere properties. This constitutes a ligand exchange mechanism, therefore the complex ions, rather than aluminum oxide or precipitate, will now be produced because the aluminum does not become insoluble.

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