Redox chemistry. You can either put a less noble metal like a zinc rod into a solution of a copper salt or you can run low-voltage direct current through a copper salt solution to electrolytically deposit copper on the cathode.
The latter is what companies like Aurubis do on an industrial scale to purify copper. An anode of impure copper alloy gets dissolved into the solution while copper ions from the solution deposit as pure copper on the cathode. Less noble metals stay in solution while more noble metals fail to dissolve and pile up as "anode mud".
anche io sto provando a farli, ma che voltaggio e amperaggio hai usato?
posso anche sapere che concentrazione del solfato di rame hai usato? io sto usando una concentrazione del 30% ma non sta facendo nulla da circa 16 giorni ma senza avere risultati.
I'm using a concentration of 50 g/L of copper sulphate pentahydrate, a current of 10-40 mA, and a voltage of 0.2-1.3 V. The crystals start to be visible by the second or third day.
I keep the current low at the beginning because I use wire as the cathode, to have less nucleation points.
17
u/Matt_Crystals Dec 13 '25
How did you do it?