Experiments

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Purpose & Overview

Copper chloride is a salt that forms green crystals with various structures. Copper(II) chloride to be precise, for there is also copper(I) chloride.

There are multiple ways of making copper chloride, one of them is by just adding sodium chloride (table salt) to copper sulfate in the right proportion. It's also possible to make copper chloride by combining copper oxide or copper carbonate with hydrochloric acid, or by just adding the elements copper and chlorine. There are other ways, but they are much more difficult and don't yield good results. I might be trying them in the future though.

First I'm going to just use sodium chloride and copper sulfate to produce copper chloride.

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What you need

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Theory

There is not really a chemical reaction taking place, but more of a reordering of atoms.

2NaCl(aq) + CuSO4 -->(Evaporation)--> CuCl2(aq) + Na2SO4(aq)

Theoretically its possible to get 115 grams of copper chloride using 100 grams of sodium chloride and 213 grams of copper sulfate pentahydrate.

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Procedure

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Result

Is it possible that not only CuCl2 is formed, but also CuCl? Not really, for the solubility of CuCl in water is only 0.062 g/L. If it had formed in large quantities, it would have formed a precipitate.[3]

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Conclusion

To be continued...

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Extra

A copper chloride solution can be used to react with aluminium and grow dendritic copper crystals using that reaction. Be carefull however, copper chloride is very corrosive.

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Sources

[1] Wikipedia

[2] Specimen from my personal collection, photo taken by me.

[3] Wikipedia