Put the petri dish with the copper sulfate solution and electrodes on top of the dish holding the magnets. Provide the lecturer with a 6 to 12 volt, 1 to 2 amp battery or power supply, two wires with ...

Copper ions in solution moving between two electrodes in a magnetic field produce a swirling motion that can easily be displayed on an overhead projector. Place some pepper on the surface of the ...

such as copper(II) sulfate. The anode (positive electrode) is made from impure copper and the cathode (negative electrode) is made from pure copper. Pure copper forms on the cathode. The slideshow ...