I heard Urushibara also made copper catalysts, and I wanted to try out their preparation (just out of curiousity, I realize they're much, much less active than the cobalt or nickel counterparts).
4g of copper sulfate pentahydrate (mw 250 g/mol, similar to nickel chloride or cobalt chloride salts used, 240g/mol) added to 75ml of water, and slowly added 5g of crumpled al foil. The solution lost its characteristic blue color and was a mixture of aluminum foil and preciptated copper, most of the foil remained unharmed.
Are all of the solids (including unused aluminum) added to 100g of 20% NaOH? Or is it just the copper that falls to the bottom?
I'm going off of:
https://www.thevespiary.org/rhodium/Rhodium/chemistry/amph.urushibara.txt (https://www.thevespiary.org/rhodium/Rhodium/chemistry/amph.urushibara.txt)
(and not the original Urushibara text)
PS. Or did I not wait long enough for all of the aluminum to dissolve in reaction with the water and dilute hydrochloric acid?
I guess I should read the whole urushibara text.
LOL
Foxy STILL needs to get laid!!!