If it is the latter, then what you're really asking is how to separate Na from Cu2 . The simplest way would be to precipitate Cu as an insoluble compound. You can do this by adding a source of OH-, and then converting the Cu(OH)2 to CuO by heating it. The CuO will settle out more easily than Cu(OH)2. Filter the solution to separate the solid CuO. You could electrolyze a solution of NaCl and Cuprous Chloride(WSDTY). The Cu will plate out and also produced dangerous Cl2 gas. Be careful with that possibility.

What i would suggest to you is this, create sort of a flow chart, and then look for what is unique to each chemical, Couple of things, Lead Chloride PbCl is a salt, and exists in a solution as two ions, hence it might help to play around with the boiling point. A thing you could try is the boiling point, if your mixture is a liquid, check and see the boilling points of each and then boil your solution and seperate using I believe a Hickman still. However, this will only work if there is a major difference in the boiling point of the solution. If mixture is a solid, than dissolve it in a inert liquid solvent. A final thing, try and google some Ochem Lab books and go to google books and use the ones with preview to get a better idea of seperation/purification techniques.

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