How can you transform a copper penny into gold during chemical reaction?
You can cause it to LOOK like gold if you get concentrated phosphoric and nitric acids.50 mls of H3PO4 and add 5mls of HNO3,stir.use stainless steel or plastic tongs to hold the coin under the surface till whole coin is covered with small bubbles,haul it out and wash under strongly running water,dry :its done.EUREKA! (it’s not gold unfortunately) Good for speeding up the outgassing of vacuum systems. Sorry Helmut,modern U.K. “copper coinage”is a steel core covered with a copper/tin alloy called bronze.Hence the modern coin is ferromagnetic. Helen S good commercial thinking but my studies show that at present more than 90% of the UK copper coins in circulation are of the magnetic variety.Pretty soon ‘harvesters’will need large scale magnetic separation lines to make a few bob.
