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Chem Lab Report1 - Chemistry T i tle Determining the...

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Chemistry Title: Determining the Stoichiometry of Chemical Reactions Partners: Adam Michalowsky, Ross Goldblum, Aviran Cohen Purpose: To find the optimum mole ratio for the formation of a precipitate in a double replacement reaction and use this information to predict the chemical formula of the precipitate. Data: Part one: Cylinder 1 2 3 4 5 Fe(NO 3 ) 3 0.1 M (mL) 2 5 6 8 10 NaOH 0.1 M (mL) 22 25 24 24 25 Fe:OH Mole Ratio 1:11 1:5 1:4 1:3 2:5 Volume Precipitate (mL) 5.9 12.3 13.6 28.7 0 Part two: Cylinder 1 2 3 4 5 CuCl 2 0.05 M (mL) 10 12 15 18 20 Na 3 PO 4 0.1 M (mL) 20 18 15 12 10 Cu:PO 4 Mole Ratio 1:2 2:3 1:1 3:2 2:1 Volume Precipitate (mL) 8.5 9.5 14.5 5.9 7.9
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Conclusion: For the most part, the results of the lab were not what we expected them to be. The amount of precipitate that was left over after the reaction was not as much as the molar ratio would have suggested. For the most part, on the first part, most of the volumes of the precipitates were more than what was expected, but on the second part, most of the
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