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Thread: any chemists here?

  1. #1
    Senior Member
    Join Date
    Mar 2007
    Atlanta, GA

    Default any chemists here?

    interested to find out whether a silver wire is pure silver or contains other metals like iron/copper

    cuz apparently the wire is attracted to magnets

    so.. can anyone devise a simple chemical test to show this?

    i've access to various reagents, acids etc.

    will 10M HCL be a good option? considering if silver is non soluble in 10m HCL whilst other metals would probably react

    what should i use to precipitate the other ions? iron? copper?
    chezburgr i can haz?

  2. #2

    Default Re: any chemists here?

    Digging out my secondary school chemistry text book...

    Assuming only 3 possible metals namely Silver, Iron, Copper.

    If you use HCl, only Iron will dissolve while Silver and Copper will remind because they are generally not dissolve in HCl. You may want to use concentrated Nitric Acid instead.

    2HCl (aq) + Fe (s) -> Fe2+(aq) + 2Cl-(aq) + H2 (g)

    Testing for Iron(II) ions
    Effect with aqueous Sodium Hydroxide -> green ppt insoluble in excess
    Effect with aqueous ammonia -> green ppt insoluble in excess

    Refer to Wikipedia, you find a list of Ferromagnetic materials

    You can actually use Wikipedia to see the individual properties of the metals and devise a suitable test for the presence of the metals.
    Last edited by Youhong; 29th September 2008 at 01:21 AM.
    I am NOT a PROfessional photographer and photography is NOT my hobby


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