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woelen
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Hexaamminenickel(II) also can be kept indefinitely in a completely sealed vessel, but when not sealed properly, it quickly loses ammonia. Recently, I
made a nickel-ethylenediamine-ammonia complex (dark blue), but after one day of exposure to air, quite a lot of pale blue powder was formed and it
lost a lot of ammonia. I also made pure hexamminenickel(II) perchlorate, and that's the same. In a few days time, you see a change of color, if not
stored perfectly sealed.
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vano
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tetraamminecopper(ii) nitrate
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charley1957
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Vano that's a really pretty copper salt.
You can’t claim you drank all day if you didn’t start early in the morning.
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vano
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Thank you
[Edited on 11-12-2020 by vano.kavt]
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itsallgoodjames
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Tetraamminecopper(ii) nitrate is energetic, correct? That seems like a lot of explosive material to make at once, no?
Nuclear physics is neat. It's a shame it's so regulated...
Now that I think about it, that's probably a good thing. Still annoying though.
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vano
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It isn't very energetic material like nickel hydrazine nitrate or perchlorate complexes. If you heat it will explode. But if you add a few grams of
HMTD for every hundred grams then it will be quite explosive at room temperature.
[Edited on 12-12-2020 by vano.kavt]
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TriiodideFrog
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Just curious, what are you going to use the copper acetate for?
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artemov
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Quote: Originally posted by woelen  | | Hexaamminenickel(II) also can be kept indefinitely in a completely sealed vessel, but when not sealed properly, it quickly loses ammonia. Recently, I
made a nickel-ethylenediamine-ammonia complex (dark blue), but after one day of exposure to air, quite a lot of pale blue powder was formed and it
lost a lot of ammonia. I also made pure hexamminenickel(II) perchlorate, and that's the same. In a few days time, you see a change of color, if not
stored perfectly sealed. |
Cheers. I sort of sealed my tetraamminecopper, hopefully it will last.
Is this blue or purple? Would you say the hexamminenickel is more purple? 
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Lion850
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I tried to make copper gluconate C12H22CuO14 by double displacement reaction between calcium gluconate and copper sulphate. Calcium sulphate ppt out
and after filtering the solution was first reduced in volume by slow boiling and then left out in a dish to dry.
After some 2 weeks a wet sticky blue-green substance was left. I tried to dry this in the sun a few days but it stayed sticky. It was then placed on a
steam bath for some 4 hours but it is still a very sticky glob - color now dark olive green. See photo.
It does not seem hygroscopic. Any ideas how to get this to a dry powder state?
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DraconicAcid
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Triturate with alcohol?
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Lion850
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DraconicAcid thanks for the suggestion!
Yesterday I stirred the blob of copper gluconate with about 100ml of very hot ethanol for some 30 minutes. This resulted in a green fine suspension
with a few pea sized pieces. I filtered it off and got the below remainder.
I left this to dry on the bench overnight but this morning it had gained 0.2g of weight and was starting to get sticky again. I then boiled and
stirred it in methanol (I ran out of ethanol) for 40 minutes. This again broke it up but into a more coarse powder. I filtered it and the green
remainder went onto a steam bath for some 15 minutes. It was then ground in a mortar and the final result is the below dry free-flowing pale green
powder, which I presume to be copper gluconate.
I'll have a go at cobalt gluconate next.
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