Camroc37
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CuCO3+CuNO3= purple liquid?
A weird reaction happened to me today: Copper Nitrate reacted with Copper Carbonate to form a purple liquid.
They were both fairly and not in solution, but the Copper Nitrate had just been recrystallized so it was a little wet.
Any ideas? This may be a simple reaction, but I don't know of it.
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Volanschemia
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I'm guessing some kind of complex?
Copper(II) Nitrate is quite hygroscopic, so it will pull in water.
"The chemists are a strange class of mortals, impelled by an almost insane impulse to seek their pleasures amid smoke and
vapor, soot and flame, poisons and poverty; yet among all these evils I seem to live so sweetly that may I die if I were to change places with the
Persian king" - Johann Joachim Becher, 1635 to 1682.
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woelen
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Were the salts commercial samples or home made? Purity can be an issue.
True copper carbonate is not commonly available and is hard to make. The commercial material is a basic carbonate.
The presence of ammonium ions may cause appearance of a purple color, due to formation of the tetrammine complex of copper(II), which has a very deep
blue/indigo color.
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Camroc37
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Quote: Originally posted by woelen  | Were the salts commercial samples or home made? Purity can be an issue.
True copper carbonate is not commonly available and is hard to make. The commercial material is a basic carbonate.
The presence of ammonium ions may cause appearance of a purple color, due to formation of the tetrammine complex of copper(II), which has a very deep
blue/indigo color. |
Both were homemade.
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Volanschemia
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How exactly did you make them? It's probably impurities from the synthesis that is causing the complex.
"The chemists are a strange class of mortals, impelled by an almost insane impulse to seek their pleasures amid smoke and
vapor, soot and flame, poisons and poverty; yet among all these evils I seem to live so sweetly that may I die if I were to change places with the
Persian king" - Johann Joachim Becher, 1635 to 1682.
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woelen
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We indeed need more information before we will be able to provide insight in your reaction. The nature of the impurities can have a strong impact on
the observations.
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