Question

Why does experimenting the change of mass of a metal when sulfuric acid is added important? In other words, Why should the experiment be done what will it help us for?

Answer 1

Answer:

TO KNOW REACTIVITY OF H2SO4...

Explanation:

IN CHEMISTRY, ONE DO MANY SUCH RXNS AND EXPTS TO RESEARC FOR NEW FEATURES OF ANY COMPOUND OR METAL....

Answer 2

Answer:

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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.

Lesson 1 is a series of test tube experiments in which each working group establishes as a common feature that hydrogen is given off as metals react with an acid – if the metal reacts at all. This should take around 40 minutes, and most classes should be able to do this version. Each working group needs a small selection of metals and acids to test.

The range of metals and acids tested can be extended to a teacher demonstration in the concluding part of this lesson.........