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Displacement reaction, Zn in CuSO4 solution

Displacement reaction, Zn in CuSO4 solution

A500/0101

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Credit

RICHARD MEGNA / FUNDAMENTAL PHOTOS / SCIENCE PHOTO LIBRARY RICHARD MEGNA / FUNDAMENTAL PHOTOS / SCIENCE PHOTO LIBRARY

Caption

Electron displacement reaction. If a metal strip is placed in a solution of ions of a metal of lower electronegativity, the strip metal will displace the ions in solution. In this case, the metal strip is zinc (electronegativity = 3. The zinc loses electrons to form zinc ions, these displace the copper ions from solution by making them combine with electrons to form metallic copper. This creates a dark deposit of copper on the surface of the zinc strip. This image shows the reaction shortly after initiation.

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