CHRIS25
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Just curiosity - copper in still sea water
Living along the coast line I have found a lot of copper. Always clean and shiny, in different places sometimes a thin layer of dark oxides due to
the surrounding iron. But this is Moving turbulent seawater.
But would things be different in Totally still seawater I wondered? However I decided to collect some seawater and place a clean piece of copper in it
and after three days this is what has happened. The copper itself has been oxidised very slightly, actually the piece that is sticking out of the
seawater is more oxidised than the piece inside, the test tube was secured with a rubber stopper.
Sorry about the quality.
It is the precipitate that surprised me. A very bright light blue which I summized might be copper chloride? Since the chlorides are third in
abundance in the seawater. Yes, I really do not know so I am simply curious about what this might be.
Also The dark discolouration that is obviously oxide is DARKEST out of the seawater, and becomes very progressively lighter as it nears the bottom of
the test tube. About 2cm from the bottom is shiny.
[Edited on 11-5-2012 by CHRIS25]
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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ScienceSquirrel
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Mood: Dogs are pets but cats are little furry humans with four feet and self determination! 
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I would guess that the blue solid is a basic carbonate.
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CHRIS25
National Hazard
Posts: 951
Registered: 6-4-2012
Location: Ireland
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Ok.
‘Calcination… is such a Separation of Bodies by Fire, as makes ‘em easily reducible into Powder; and for that reason ‘tis call’d by some
Chymical Pulverization.’ (John Friend, Chymical Lectures London, 1712)
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. (William Penn 1644-1718)
The very nature of Random, Chance development precludes the existence of Order - strange that our organic and inorganic world is so well defined by
precision and law. (me)
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