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Benzamide

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1. Based on the mixed point analysis, I determined the identity of the unknown compound to be benzamide. I was able to determine this by comparing the melting point of the unknown samples slow run to the two mixed samples slow run. The mixed melting point slow run with my unknown and 2-ethoxybenzamide compared to just the unknown showed an depressed melting point. For my unknown my melting point range was 126.2-127 °C, and for the mixed sample with 2-ethoxybenzamide was 95.2-100.7 °C. Comparing the unknown sample slow run to the mixed unknown and benzamide sample slow run the melting point range did not change.
2. The unknown sample which i concluded to be benzamide had the melting point range of 126.2-127 °C. The melting point range value i observed is within the literature value of Benzamide, 125-128 °C. My observed melting point range is not wide, it is smaller then the literature value melting range of benzamide. Based on the unknown melting point with the literature value of benzamide, my unknown sample is pure.
3. …show more content…
Most of the 2-ethoxybenzamide compound is non-polar which results in the low solubility. For the compound to have high solubility, it needs hydrogen bonding and a polar group.
4. The student’s error was that they did not give the recrystallized unknown time to dry before she weighted the mass. Since the sample was not fully dry, it affected the weight of the solid. During our experiment, our recrystallized unknown was given a week to dry completely before we took the mass. The student should wait sometime so that air can facilitate the drying process to get a correct measurement of

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