Lab Report #3

Lab Report #3 - A Sequence of Chemical Reaction By: Jeet...

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A Sequence of Chemical Reaction By: Jeet Patel Lab partner: MaryRose Sep 12 2011
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Data: Molarity of Cu(OH)2 :- .157M Empty Beaker (g) Beaker with Cu(NO3)2 (g) 132.59 157.16 Empty Beaker (g) Beaker w/ Copper-solid (g) 132.56 132.62
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Results: - After finding the actual mass of Copper left over at the end of the lab, it was compared with the initial mass of copper. According to the law of conservation of mass, no mass should be added or removed but results were pretty off. The percent yield was found to be only 24%. After doing everything correctly, the results were still way to off. The final mass was found to be 0.0600g and the initial mass of copper was 0.250g. Discussion questions: - 1. This could happen if more Magnesium was added to the solution at last step. It could also be caused by access water that is not boiled of from the beaker. 2. 6HCl + Cu3(PO4)2 ----> 3CuCl2 + 2H3PO4 moles of Cu3(PO4)2 moles = mass / molar mass moles Cu3(PO4)2 = 0.305 g / 380.586 g/mol = 0.000801 moles Cu3(PO4)2
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Lab Report #3 - A Sequence of Chemical Reaction By: Jeet...

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