Lesson: Chapter 16 — Changes of Matter

16.3. Metals with acids and salts 5 of 6 Reset answers

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Question 5

Why must the reaction of potassium, sodium and calcium with dilute acids not be carried out in the laboratory?

A They do not give hydrogen B They do not react with acids at all C They are very expensive D They react violently with dilute acids and an explosion may occur

The right answer is the one marked above.

They react violently with dilute acids and an explosion may occur. Ignition may follow as well.

Not because they fail to react — quite the opposite — but because they react far too fast. Cost has nothing to do with it.

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