Lab%2007%20%28-%29%20-%20Copper%20Lab%20%28STUDENT%29

Lab%2007%20%28-%29%20-%20Copper%20Lab%20%28STUDENT%29 -...

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Unformatted text preview: Copper Lab Created by Jackie Jurchenko Introduction Will be doing an ______/______ reaction to make metallic copper. Also will calculate the theoretical yield and % yield. • _______ – what supposed to end up with • _____ – what you actually ended up with +2 0 _ Cu (aq) + _ Al (aq) +3 0 _ Al (aq) + _ Cu (s) con’t _ Cu+2(aq) + _ Al0(aq) Copper ion (soln) + Al wire _ Al+3(aq) + _ Cu0(s) Al ion + Copper Copper is gaining electrons – ______ Al is losing electrons - ______ Set-up Vacuum Filtration Buchner funnel Al wire Rubber adapter Clamp down! To trap Side arm flask Calculations Assume have an excess of Al X g CuCl2 x 1 mole CuCl2 = Y moles CuCl2 MW of CuCl2 1:1 moles CuCl2:moles Cu (moles ______ = moles ____ = moles ____) con’t Y moles CuCl2 1 mole Cu+2 x 1 mole Cu0 x 63.55 g Cu0 1 mole CuCl2 1 mole Cu+2 1 mole Cu0 x = Z g Cu0 (theoretical yield) - What you could get. % yield = actual mass x 100 theoretical mass % error = ____ – _____ ____ x 100 Tips Gently agitate beaker to loosen the copper that is forming (expose more Al to react) Rinse off wire when done (get all Copper you can) Put wire in hood when done ...
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This note was uploaded on 01/19/2012 for the course CHEM 1211L taught by Professor Dennison during the Spring '08 term at Kennesaw.

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