Make Silver Powder by Electrochemistry
In this video we make silver powder using electrochemistry.
The process is pretty simple. Make a solution of 1g silver nitrate in 50mL water. Submerge an anode made of pure silver (i'm using silver coins) and a cathode of carbon. Connect the anode (silver) to the positive terminal of a variable power supply and connect the cathode (carbon) to the negative terminal. Apply a current and raise it until the cathode just starts to bubble hydrogen and then lower it about 25%. Magnetic stirring and a stir bar should be applied to constantly shred the silver dendrites as they grow.
Eventually the anode will be consumed and the solution is decanted to recover the silver powder. The silver powder is washed a few times with water and then dried by heating on the hot plate.
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