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Displacement reaction

Displacement reaction

C035/9305

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Credit

MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY

Caption

Displacement reaction of copper and silver nitrate solution. When copper metal is lowered into a solution of 0.1N silver nitrate the Ag+ ions pull electrons off the silver crystals, which in turn remove electrons from the chip of copper and produce copper ions, thus setting up a simple electrochemical circuit. For each copper ion that forms in solution, two silver ions will add to the silver crystal structure. At 36x24 millimetres the centre image is over 3 times life while the surrounding images show the progress over 30 minutes.

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Model release not required. Property release not required.

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