Melting Points and Mixed Melting Points of Compounds Having Similar Melting Points Determine the melting points of pure samples of cinnamic acid and urea as well as a 50:50 mixture of the two, and record the data in your lab notebook.
Urea does not have a boiling point. Instead, it skips boiling and simply decomposes at around 150 degrees Celsius. At around 135 degrees C, urea melts.
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Lab 1 Melting Point Reading: Zubrick, pages 86-92. Pre-Lab: Look up the structures and melting points for urea and cinnamic acid, and look up the definition of "eutectic point". Introduction: One of the most common methods for determining the purity (and preliminary identification) of organic compounds is melting point determination.
Urea | NH2CONH2 or CH4N2O | CID 1176 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety .
Record the melting point ranges of urea and cinnamic acid in your notebook. To demonstrate the effect of impurities on the melting point of a pure substance, determine the melting point range of a 50-50 mixture by weight (use about 50 mg of each compound) of urea and cinnamic acid. Simultaneously, determine the melting
132.7 °C Jean-Claude Bradley Open Melting Point Dataset 22275, 28633 134 °C Jean-Claude Bradley Open Melting Point Dataset 8712 132-135 °C Alfa Aesar 36428, 36429
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Two substances labeled urea 1 and urea 2, both declared as urea. In the case of urea 1, the melting point of the substance was given as 135 °C. To determine whether the substances were in fact urea, the melting be-havior of the individual substances and a 1:1 mixture was investigated