Orgo I - Exp 1 (Melting Point).docx

Orgo I - Exp 1 (Melting Point).docx - Lok-Yee Lam CHEM...

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Lok-Yee Lam CHEM 223-19: Organic Chemistry I Laboratory Lab TA: Priyanka Hosh Lab Partner: Afsara Uddin September 26, 2018 Experiment #1: Melting Point Introduction All substances have a melting point (mp), which is the temperature at which the solid state converts to the liquid state at 1 atm. To be more specific, we must consider the melting point range. By definition, this is the difference between the temperature at which the sample begins to melt and the temperature at which the sample is completely melted. According to the theory of melting point, pure crystalline compounds have sharp melting point ranges and impurities will lower melting points. Thus, we may apply this logic and take a mixed melting point to determine the identity of an unknown compound. Aim In order to familiarize ourselves with the equipment used to take melting points, we will prepare three different melting point capillary tubes (trans-cinnamic acid, urea, 1:1 mixture) to practice determining the melting points and observing the changes due to the presence of an “impurity.”
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  • Fall '10
  • hardin
  • Melting, Chemical compound, Irritation

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