Question

Why does iron and aluminium store concentrated trioxonitrate

Answer 1

Answer:

Aluminium doesn't react with either dilute or concentrated trioxonitrate (V) acid because an insoluble oxide is formed on its surface which renders it passive.

Answer 2

Answer:

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Although chromium (Cr), iron (Fe), and aluminum (Al) readily dissolve in dilute nitric acid, the concentrated acid forms a metal-oxide layer that protects the bulk of the metal from further oxidation. The formation of this protective layer is called passivation.

Explanation:

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