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<p>[QUOTE=&quot;Just Carl, post: 548661, member: 4552&quot;]You kind of missed a lot of interesting findings by not allowing the left over solutions to evaporate. Your best reaction would be with Sulfuric Acid though. That one will disolve the coin&nbsp; completely and through careful evaporation processes you could end up with a fantastic Translucent Blue/Green Crystal. The shape would be consistant for all such compounds of Cupric Sulfate and should be rather a parallelogram. Note as you disolve Copper coins in almost anything it will form an electrovalent substance that will crystalize if left to evaporate. However, due to some possibilities of impurities you must filter the final solution and use a consistant temperature for the evaporation. </p><p>Have you tried just shooting one out of the air like in the old West Movies?[/QUOTE]</p><p><br /></p>

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