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Dilute nitric or sulfuric acid shows little reaction with aluminum, but hydrochloric acid dissolves it, giving off hydrogen gas. Remember too that aluminum forms a layer of oxide in air very quickly,which protects its surface. If you test for a reaction in acid, scratch the surface just before the test.

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12y ago
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11y ago

Aluminium does react with Hydrochloric acid, but, it also reacts with the oxygen in the air to create a coating of aluminium oxide, which is unreactive with acid. If you remove the aluminium oxide layer before putting the aluminium in the acid it will react.

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11y ago

This is so because it forms a surface coating oxide, which is passive therefore no reaction can occur.

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Q: Why doesnt aluminum react with hyrdochloric acids?
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Does aliminum react with acids?

Yes. aluminum will react with some acids. But after being exposed to air it forms an oxide layer that many acids can't penetrate.


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