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Question:Can copper sulfide and copper oxide products be precisely visually identified?

gretchengehrke asked on November 09, 2017 00:00
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I'm interested in using the copper pipe method for detecting hydrogen sulfide that Lionel Milberger has been developing (here: https://publiclab.org/wiki/hydrogen-sulfide-copper-pipe). Copper is subject to oxidation and sulfidation, and a lot of folks are curious how well we can distinguish cuprous oxide (Cu2O, which has a reddish color), cupric oxide (CuO, which has a black/brown color), and cupric sulfide (CuS, which has a black color). Can we distinguish them visually? What are other methods for distinguishing them?



h2s-copper-pipe

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