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  • $\begingroup$ Do you have a picture of the vessel where the nails did not dissolve? And were/are you able to check the acidity of your dark green solution? We (and you) might get some clues from those observations. $\endgroup$ Commented May 18, 2016 at 20:01
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    $\begingroup$ @OscarLanzi I just added an image of the solution $\endgroup$
    – Ryan
    Commented May 18, 2016 at 20:40
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    $\begingroup$ Btw, nobody still speculated about nature of white precipitate on the photo. $\endgroup$
    – sa7
    Commented Nov 7, 2016 at 16:23