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June 13 2011 2 13 /06 /June /2011 14:32

Warning: Copper compounds are toxic. Do not eat or drink. Hydrochloric acid is corrosive. Wear gloves.

 

You will need:

 

Copper(II) chloride

Hydrochloric acid

Test tube

 

Copper(II) chloride forms chloro complexes with hydrochloric acid. They range in color from green to yellow. Add hydrochloric acid to a copper(II) chloride solution. It will turn yellow. This is the CuCl4(2-) ion. When diluted with enough water, it will form the normal Cu(H2O)(2+) ion again, which is green-blue.

 

CuCl2-equilibrium.JPG

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Published by LanthanumK - in Experiments
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