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Acids, bases and salt
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04/09/2021 10:11 am
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Which gas is usually liberated when an acid reacts with a metal? Illustrate with an example. How will you test for the presence of this gas?
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04/09/2021 10:12 am
Metals are mostly reactive in nature. They react with dilute acids (HCl and H2SO4) to evolve hydrogen gas.
For example:
Zn(s) + 2HCl(aq) ➝ ZnCl2(aq) + H2(g)
The gas burns with a pop sound when a burning candle is brought near to it.