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Unformatted text preview: 90 o C +90 o C = 90 o C 2 Average ending melting temperature: 92 C + 92 C = 92 C 2 Average melting temperature of the alum: 90 o C + 92 C = 91 C 2 Average melting range: 2 C + 2 C = 2 C 2 % error = 92.5 C- 91 C x 100 = 1.62% The results are accurate. 92.5 C Conclusion: There was not a very high percent yield of the alum in this experiment. The yield was not small, but was not very good either. Error could have resulted from certain areas of the experiment where the entire solution was not used or reacted. For example, after the aluminum was reacted with KOH and the solution was filtered, all of the solution may not have been transferred through the filter paper. Also, some reactions may not have been allowed to go to completion. However, the sample of alum produced was very pure. There was not a large melting range and the average melting temperature was accurate....
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This note was uploaded on 04/07/2008 for the course CHEM 1560 taught by Professor Baird, b during the Fall '07 term at Cornell University (Engineering School).
- Fall '07
- BAIRD, B