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What gas emits when alum is heated?

Updated: 8/11/2023
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Rkvelu

Lvl 1
10y ago

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The answer is that it is dependent on the source. A sample of pure aluminum should not release any gas, aside from a small amount of oxygen due to a layer of aluminum oxide. As the source changes, so does the gas evolved. Carbonates will give carbon dioxide, sulphates: sulphur dioxide, etc.

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Wiki User

12y ago
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Wiki User

10y ago

When alum is heated they liquify and as the waterÊcrystalines evaporate turningÊthe alumsÊin to an amorhous powder. Alums are astringent and acidic. Alums are also used in the preservations of drinking water.

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