Sample Calculations

# Sample Calculations - Sample Calculations Calculations of...

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Sample Calculations Calculations of moles of Racemic Mixture Molar Mass of Racemic Mixture (±)- α -phenylethylamine = 121.18 g/mol Volume = 10.0mL Density = 0.94 g/mL Mass = Volume x Density = 10.0mL x 0.94 g/mL = 9.4 g Moles of (±)- α -phenylethylamine = = 0.07756 moles Calculation Of moles of (+)-Tartaric Acid Theoretical yield of (-) Amine (+) Hydrogen Tartate= 0.038785 moles ~ 0.039 moles Molecular Weight of (-) Amine (+) Hydrogen Tartate= 271.24 g/mol Moles of (+) tartaric acid= n= m/Mw Molecular Weight of (+) Tartaric Acid = 150.09 g/mol Molecular weight of salt= 271.24 g/mol x 0.039 mol = 10.58 g = Theoretical Yield Mass of (+) Tartaric Acid = 10.58 g Moles of (+) Tartaric Acid = 10.58 g/150.09 g/mol = 0.07049 moles of (+)-tartaric acid The limiting reagent is (±)-α-phenylethylamine, so the moles used and produced is 0.07049 moles Calculation of theoretical mass of (-)-α-phenylethyl ammonium-(+)-tartrate salt and % Yield Since it is a racemic mixture we can assume that half the moles of ()-

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## This note was uploaded on 06/06/2011 for the course CHEM 2020 taught by Professor Potvin during the Spring '09 term at York University.

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Sample Calculations - Sample Calculations Calculations of...

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