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Topic: green solution  (Read 2957 times)

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Offline antimatter101

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green solution
« on: December 19, 2012, 10:25:59 PM »
Which one of these have a green solution? Cupric citrate, cuprous citrate, cupric tatrate, or cuprous tartrate? Please let me know.

Offline Hunter2

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Re: green solution
« Reply #1 on: December 20, 2012, 01:00:02 AM »
Cu(H2O)42+ are blue. Do Cu+ exist with citrate or tartrate? Coppercitrate have some green colour.

Offline antimatter101

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Re: green solution
« Reply #2 on: December 20, 2012, 04:46:56 AM »
Which copper citrate? Cupric or cuprous?

Offline Hunter2

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Re: green solution
« Reply #3 on: December 20, 2012, 05:50:05 AM »
Cu2+ because Cu+ is not existing there. Cu+ exist in my opinion only as oxide, sulfide and (pseudo)halogenide.

I am not sure if citric or tatratic can complex such kind of things.

Offline antimatter101

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Re: green solution
« Reply #4 on: January 01, 2013, 03:35:23 AM »
By the way, it is dark green. When more water evaporated it even looked a bit yellow.

Offline kaliaden

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Re: green solution
« Reply #5 on: January 04, 2013, 03:15:36 PM »
Cupric salts can show both blue and green solutions as well especially in the presence of chloride ions due to formation of the [CuCl4]2- ion.

I don't think it is a cuprous salt since Cu+ is unstable in solution and almost all cuprous compounds are insoluble.

Again.. cupric citrate is supposed to be insoluble.
Cupric tartrate is highly soluble since the tartrate ions form a stable complex with copper. So it is most likely cupric tartrate although I'm not absolutely sure...

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