Lab report on melting point for organic chemistry 1 PDF

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This is a lab report for the melting point lab done in chem 223 In hunter college. Format Is done according to lab manual....

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Ashley Aleman Professor Tapia Chem 223 February 25, 2022 Melting Point Purpose The purpose of this lab was to distinguish compounds from each other using melting point. This was accomplished by finding the melting points of the compounds trans-cinnamic acid, urea, and a 1:1 ratio mixture that contains both trans-cinnamic acid and urea. After, an unknown compound will be named due to the melting point that is found for the specific unknown compound. Knowing how to find the melting point of a compound is important because then we can differentiate between different compounds. Chemicals and Equipment 1. Melting point apparatus to measure melting point of compounds 2. Capillary tubes 3. Digital thermometer to take temperature 4. Urea, trans-cinnamic acid, and 1:1 mixture of the two 5. Unknown sample references Summary of Procedure To sum up, in this lab we used the melting point apparatus to heat the compounds until the powder turned into a liquid, then recorded the temperature. The temperature that the compound turns into liquid at is the melting point. To make the observations, you

must keep your eyes on the melting point apparatus in order to catch exactly when the compound melts into a liquid. Results Part a The initial temperature (room temperature) was 24.5℃. Compound

Melting Point

Trans-cinnamic acid

135℃

Urea

135℃

1:1 mixture

103℃

Part b I had compound number 6. This compound started to melt at about 121.2℃-124.3℃. According to the provided table in our lab manual, it looks like I had the compound benzoic acid. Benzoic acid is supposed to have a melting point of 122-123℃ which matches my results. Part c To confirm this, I mixed together benzoic acid with unknown compound number 6 and checked to see if this mixture would provide the same melting point. After using the melting point apparatus I recorded the melting point to be about 120℃ which matches the results of the unknown compound number 6 being benzoic acid. Discussion & Conclusion In conclusion, melting point is an important factor in distinguishing compounds from each other. Using melting point, I was able to figure out the name of an unknown compound and was able to confirm....