suppose someone tells you that a green object contains copper. you are not convinced, as you have seen copper wires and copper jewellery are reddish-brown metal. Is it possible that this green substance really does contain copper, explain....
2006-11-22 07:31:28 · 7 answers · asked by Geron P 1 in Science & Mathematics ➔ Chemistry
Copper Metal is a reddish-brown colour, but copper changes colour when it oxidizes. Pennies are an excellent example of green copper. New pennies are red, but as they get older and oxidize they start to turn black (copper Oxide CuO) and then green (copper carbonate Cu2CO3). Copper can also be blue as in Copper sulfate CuSO4, copper hydroxide Cu(OH)2 and copper nitrate Cu(NO3)2.
2006-11-22 07:39:36 · answer #1 · answered by Girbot 2 · 1⤊ 0⤋
The green object could indeed contain copper. An example is the Statue of Liberty. The statue is made of copper or bronze plates attached to a framework. Weathering causes formation of green oxides and salts called a patina over the usually reddish metal. The patina actually protects the metal from further weathering ("rusting" through), so people don't clean it. Bronze is a reddish alloy of copper and tin.
2006-11-22 07:39:02 · answer #2 · answered by steve_geo1 7 · 0⤊ 0⤋
Yes, but it means that the copper is not there as a pure element. The greenish-colored copper is usually Copper (II) carbonate (CuCO3)
2006-11-22 07:35:49 · answer #3 · answered by Kerahna 3 · 1⤊ 0⤋
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2016-12-29 08:30:10 · answer #4 · answered by Anonymous · 0⤊ 0⤋
It means you are certainly looking at copper oxide, which of course, wouldn't be called that if there weren't any copper in it......
2006-11-22 07:38:59 · answer #5 · answered by Steve 7 · 0⤊ 0⤋
We're learning this is biology right now, and what you do is with the solution of chlorophyll and by doing that you'd find the green substance and colored substances are called pigments.
2006-11-22 07:38:56 · answer #6 · answered by softballplayer17s 1 · 0⤊ 0⤋
put it in a flam, the flame will turn a spooky green colour
2006-11-22 07:34:22 · answer #7 · answered by Anonymous · 0⤊ 0⤋