Dissolving Copper or Zinc
Posted 09 May 2005 - 11:01 AM
Posted 09 May 2005 - 05:14 PM
Good luck with disassembling your penny.
Posted 26 May 2005 - 06:56 PM
Posted 27 May 2005 - 02:14 PM
First, read what I said. Uncle Al can explain it to you but Uncle Al cannot understand it for you. Second, learn some basic inorganic chemistry. Look at a table of half potentials. Any acid will (eventually) dissolve zinc. Copper will only dissolve in acid given oxidizing (and complexing) conditions. Cf: alloy crevice and pitting resistance in Green Death solution.
copper is much less reactive than zinc- u said the opposite. Copper can also dissolve very poory, but still dissolve, in hot H2SO4. Nitric acid would be the best solvent for it, i think..
If you want it to last forever, you fabricate it from Hastelloy C-2000.
Posted 27 May 2005 - 03:55 PM
Posted 27 May 2005 - 04:01 PM
Posted 27 May 2005 - 06:00 PM
uncle al, i wasnt refering to u with my first sentence, i was actually refering to taldier.and i never said an acid will not dissolve zinc, if i did please quote it. And as i said and u said, copper will dissolve in oxidizing conditions. So i am not sure what i said incorrectly.
Give it a little time akcapr; uncle can get a little testie from time to time. You will find that he is however very intelligent and can help you with many of your projects.
Posted 16 February 2009 - 11:45 PM
Posted 17 February 2009 - 12:00 AM
Im pretty sure that both Zn and Cu can be dissolved in electrolytic reactions. Both going faster if its a basic electrolyte. The minimal voltage of Zn is around 1.216 V while Cu's is around .22 V. Hope this helps
Never mind on Cu dissolving with electric current with the help of a basic solution. It readily forms Cu(OH)2 which is quite insoluble. Sorry bout that. Just running a current through a copper wire in a Cu-X solution will have it dissolve into that solution. The current will depend on that solutions conductivity. I suggest CuSO4.