I need it to be as pure as possible and locally if available, (i live in long beach). I have no idea where to get a pure block of copper from. any help would be much appreciated.thanks,
As kaushal noted, copper wire is usually very pure copper. You can hammer a thick piece of wire until it is about 21 by 21 millimeters, of uniform thickness. Then electroplate, until it is 5 mm in the thinnest part, then trim, grind and polish until the dimensions are close enough for your purpose. The electroplating will further purify the copper if you keep the plating current at one amp or less. A 3 to 5 volt power cube rated one amp or a bit more can be your source of dc current. Dissolve as much pure copper sulphate in distilled or deionized water, as will dissolve, then add a bit of sulfuric acid. You can make your own copper sulphate, by dissolving copper wire in sulfuric acid, with few impurities. Copper wie as the anode will go into solution and be plated onto the anode = positive from the power source. Neil
You need a copper as sized you mentioned in your question, if this copper is not available in your locak market, then you can do one thing, you can collect the copper raw material, which you can fine in copper base electric wire, and then you can melt it and mold it in your size, copper is easy to melt and mold, and according to your size you need only 0.020 kg, (20 gram of copper) needed to melt, Copper melting point is 1083 C, and its density is 8.9, think how you can melt and mold, if you need more information you can write me at .in
