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GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY GIPHOTOSTOCK / SCIENCE PHOTO LIBRARY
Reaction rate. Magnesium coils are placed in test tubes with hydrochloric acid of different concentrations at room temperature: 1 M (left) and 0.01 M (right). Magnesium reacts with the acid producing hydrogen bubbles: Mg + HCl -> MgCl2 + H2. The reaction proceeds more vigorously with increasing concentration of the acid. This is an example of a single displacement reaction.
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