Lab Report- Exp 1 Diels Alder Reaction

2 943 oc literature melting point percent yield 103

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1.3 % Discussion: Overall, the product obtained from the Diels-Alder reaction was somewhat pure. Based on looks, the crystals were mostly white with some brown discoloration due to the heating of the solution with the boiling stones. The discoloration of the crystals indicates impurity. The measured melting point of the crystals also indicates impurities were present. The first melting point measured was 92.7-94.2 oC, and the second was 93.2-94.3 oC. The fact that the measured melting point is quite a bit less than the literature melting point of 103-104 oC indicates impurity. If the crystals were more pure, the melting point would’ve been closer to lit value. The mass of my following product was 0.046 grams. Based on percent yield, the product’s yield is about average. As compared to ten classmates who have yields of 0.027 g, 0.002 g, 0.037g, 0.021 g, 0.057 g, 0.027 g, 0.027 g, 0.02 g, 0.06 g, and 0.057 g. The average yield among ten classmates was 0.0335 grams. As compared to my classmates, I had a relatively above average product yield with 0.046 grams. The percent yield of my product was 31.3% as compared to ten classmates who had 17.58%, 1.9%, 34%, 16%, 38.26%, 18%, 19.59%, 14.2%, 47.2%, and 39.1%. The average of my ten classmate’s percent yield was 24.6%, making my percent yield slightly above average. Overall, the yields of my experiment were good, for they were slightly above average when compared to ten other classmate’s data. There were multiple places for error to occur throughout the experiment. The first loss of product occurred when transferring the crystalline powders of maleic anhydride and butadiene sulfone from their tarred aluminum trays into the conical vial. Some of the solid powder stuck to the aluminum tray, making the amount measured more than what was actually put in. A second place where product loss could’ve occurred is when the conical vial was set on ice and allowed to recrystallize. Because the vial only sat on ice for 10 minutes,...
View Full Document

Ask a homework question - tutors are online