tag:blogger.com,1999:blog-4763358098426655968.post7769148301025419416..comments2023-12-19T10:30:46.533-05:00Comments on Home Chemistry: Penny chemistry - Verdigris and copper platingKathy Cecerihttp://www.blogger.com/profile/18188872992635537080noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-4763358098426655968.post-41514749192676115112014-05-12T15:23:35.499-04:002014-05-12T15:23:35.499-04:00Thank you for this formula. However, I found that ...Thank you for this formula. However, I found that distilled vinegar at 5% does not work. Had to check with several neighbors to get the right one. I am making copper jewelry and want the verdigris instead of the black from liver of sulfur.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-27087592293873931302009-04-05T13:55:00.000-04:002009-04-05T13:55:00.000-04:00Love this post! It really helped A LOT with my sci...Love this post! It really helped A LOT with my science experiment on copper plating. Thanks!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-24401315706415425432008-02-19T23:09:00.000-05:002008-02-19T23:09:00.000-05:00A small correction to my previous post: The reduc...A small correction to my previous post: The reduction potential of Cu+2 -> Cu(s) is +0.34 (not +0.16), giving the overall reaction a reduction potential of -0.10. Still spontaneous, but slightly less so.Unknownhttps://www.blogger.com/profile/03003654486291116874noreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-46864267218217213692008-02-19T23:02:00.000-05:002008-02-19T23:02:00.000-05:00I believe what's really going on is a standard red...I believe what's really going on is a standard redox reaction: Cu+2(aq) + Fe(s) --> Cu (s) + Fe+2(aq). This reaction is definitely spontaneous (the reduction potential of Cu+2 in acidic solution is +0.16, for Fe+2 is -0.44 for an overall reduction potential of the reaction of -0.28), so would happen in solution without requiring any electrical charge to push it through. <BR/><BR/>It's not simply positively charged copper ions being attracted to the negatively charged nail -- the ions have to be reduced in order to plate out onto the iron.Unknownhttps://www.blogger.com/profile/03003654486291116874noreply@blogger.comtag:blogger.com,1999:blog-4763358098426655968.post-56892721420235141052008-01-28T12:08:00.000-05:002008-01-28T12:08:00.000-05:00I love your site! I tried to find a way to contact...I love your site! I tried to find a way to contact you to discuss possibly exchanging some web content so we can have our users find each others sites. <BR/>Please contact me at my email address and we can arrange something.<BR/><BR/><A HREF="http://www.sciencewithme.com" REL="nofollow">Science for Children</A>Unknownhttps://www.blogger.com/profile/13472170613809249225noreply@blogger.com