guy
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Separating MgSO4 from CuSO4
I'm doning electrolysis of copper electrodes in MgSO4 solution with a salt bridge. Copper sulfate is being produced but it also has MgSO4. How
can I separate the two?
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hodges
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What I did was use a membrane between the two electrode. In my case I used two dishes with a wet paper towel connecting them. I calculated how much
electricity would need to flow to take all the Mg ions to the cathode and then let it run a bit longer than that (I had to replace the cathode
solution several times because the MgOH formed does not conduct well, but this did not affect the anode side). When I evaporated the solution I still
had some MgSO4 though - presumably because the solutions mix somewhat through the paper towel. Not sure how to do better than this.
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HNO3
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Fractional crystalization. The CuSO4 will be the blue crystals. Otherwise, you might try mixing it with alcohol, to precipitate the CuSO4, but
I'm not sure about this.
\"In the beginning, God...\" Wait a minute, God doesn\'t exist!!!!!!!!!! \"OK, in the beginning, ummm, hydrogen...\" Wait a minute, what about the
laws of thermodynamics? \"OK, in the beginning, ummm.....UMMMMM, what\'s left to choose from?
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guy
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The only alcohol I have is isopropyl (99%). The internet doesn't have much on solubility of salts in this alcohol. When I added the copper
sulfate and magnesium sulfate solution, it started crystallizing.
[Edited on 1/1/2005 by guy]
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guy
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Crystallizing out MgSO4
Would only the MgSO4 crystallize out if I place a seed crystal of MgSO4 in the solution and leaving behind only CuSO4?
How long would this take?
Thanks
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HNO3
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Do you have methanol or glycerol to spare? Methanol can be gotten from Heet(r). CuSO4 is only soluble in methanol and glycerol, but MgSO4 is only
slightly soluble in them. Then evaporate the solution.
\"In the beginning, God...\" Wait a minute, God doesn\'t exist!!!!!!!!!! \"OK, in the beginning, ummm, hydrogen...\" Wait a minute, what about the
laws of thermodynamics? \"OK, in the beginning, ummm.....UMMMMM, what\'s left to choose from?
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guy
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Just wondering...
Will the magnesium hydroxide produced be equal to 1/7 of the magnesium sulfate heptahydrate produced?
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HNO3
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I don't think any magnesium hydroxide eill form. If you have a sopper sulfate seed crystal, the CuSO4 might crystalize out though. All my copper
salt solutions have slowly crystalized out on their own.
\"In the beginning, God...\" Wait a minute, God doesn\'t exist!!!!!!!!!! \"OK, in the beginning, ummm, hydrogen...\" Wait a minute, what about the
laws of thermodynamics? \"OK, in the beginning, ummm.....UMMMMM, what\'s left to choose from?
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guy
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No.... I mean in the cathode side were hydrogen is produced.
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HNO3
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Oh. I don't know.
\"In the beginning, God...\" Wait a minute, God doesn\'t exist!!!!!!!!!! \"OK, in the beginning, ummm, hydrogen...\" Wait a minute, what about the
laws of thermodynamics? \"OK, in the beginning, ummm.....UMMMMM, what\'s left to choose from?
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