bismuthate
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Cu,Mn, and ferrocyanide
Quite by accident in an attempt to test out my MnSO4 I found that upon mixing CuSO4, MnSO4, and K4[Fe(CN)6] a purple precipitate is formed. What could
this be? Could it be manganese copper ferrocyanide? (sorry I don't know much about double salts, so I need some help)
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HgDinis25
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Could you provide more details? In wich order where the reagents added, and how much of each?
If you added the CuSO4 to K4[Fe(CN)6] you should have observed a brownish-redish precipitate of Copper (II) Ferrocyanide Cu2[Fe(CN)6].
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bismuthate
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Well I added the MnSO4, then the CuSO4, then the ferrocyanide. (I also did it adding the CuSO4 last. I have not mesured them as it appears to work in
all proportions. I willl soon get more info.
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Metacelsus
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Test solely manganese sulfate and the ferrocyanide.
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bismuthate
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That merely precipitates a white solid. Over time (overnight) the solid turns a light brown. I tried to see if the purple color was just from the two
colored precipitates being mixed by mixing a BaSO4, CuSO4 and ferrocyanide. This just lightened the brown colour and made no purple. I still have my
suspicions that it could be a physical phenomenon instead of chemical.
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