Lesson: Chapter 16 — Changes of Matter

16.3. Metals with acids and salts 2 of 6 Reset answers

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Question 2

Which metal gives off bubbles at the greatest rate with dilute hydrochloric (HCl) acid?

A Copper (Cu) B Iron (Fe) C Magnesium (Mg) D Silver (Ag)

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Magnesium (Mg). In activity 16.6 gas bubbles were given off rapidly from the tubes containing magnesium, aluminium and zinc.

Iron bubbles only slowly, copper not at all, and silver is less reactive still.

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