Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

What is green copper?

  1. Mar 20, 2005 #1

    ShawnD

    User Avatar
    Science Advisor

    Pure copper metal is orange (or pink after being anodized), copper hydroxide is blue, copper oxide is black. So then why is the statue of liberty green?
     
  2. jcsd
  3. Mar 20, 2005 #2

    Pengwuino

    User Avatar
    Gold Member

    Supposedly its oxidation... and ive seen copper turn green though too..
     
  4. Mar 20, 2005 #3

    Math Is Hard

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    I've seen lots of old pennies turn green. Must be the same thing.
     
  5. Mar 20, 2005 #4

    chroot

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    I'm no chemist, but I believe there are several different oxidation states of copper, one of which is green.

    - Warren
     
  6. Mar 21, 2005 #5
    My guess was copper sulfate, but I looked it up and its probably more likely copper carbonate. As you may have learned in your intro chem classes(especially if your teacher was an environmental guy like mine) water reacts with carbon dioxide to form carbonic acid, which gives all rain its slight acidity. This carbonic acid will then react with the copper to form cupirc and cuprous carbonate.
     
  7. Mar 21, 2005 #6
    sulfates and acetates will turn it green.
     
  8. Mar 21, 2005 #7

    Borek

    User Avatar

    Staff: Mentor

    Last edited by a moderator: Aug 13, 2013
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: What is green copper?
  1. Valency of copper (Replies: 4)

  2. Valency of Copper (Replies: 9)

  3. Copper gluconate (Replies: 7)

  4. Copper carbonate (Replies: 12)

Loading...