Answer the following questions based on the reaction of metals with hydrochloric acid:
a) Describe the reaction using an example and state its chemical equation.
b) How can we test the gas that is produced as a result of this reaction?
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The experiment is done first on a smaller scale using test tubes (lesson 1 below), with no attempt to recover the salts formed. This establishes that hydrogen production is a characteristic property of the reaction of metals and acids. It can then be done on a larger scale (lesson 2 below), and the salts formed can be recovered by crystallisation.
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