Distillation and Melting Point

Pages: 1 (329 words) Published: June 24, 2013
Distillation and Melting Point
Results: Based on the distillation experiment that was conducted, it was determined that the unknown sample A was in fact 1-Butanol. The experiment was conducted safely and successfully. For the Melting point experiment the unknown sample A was Benzoic Acid. When the unknown sample A, Benzoic Acid, and Acetanillide were combined the melting point varied by a few degrees and the melting range was broader. Conclusions: For the distillation part of the experiment, the unknown sample A was determined to be 1-Butanol because of its boiling point and its density. The unknown sample A boiled at a constant temperature of 117˚-118˚. Through the distillation process 78% of sample A was recovered and weighed. By dividing the weight (11g) of the sample by the volume (14mL) the density of the sample was 0.786. According to the charts 1-Butanol is known to boil at 117˚-118˚ and its density is 0.775. Due to these descriptions and results compound A was determined to be 1-Butanol with only 21% error in the density (0.786-0.775÷0.775= 0.214 x 100 = 21%). After the melting point experiment was conducted the unknown sample A was determined to be Benzoic Acid. The unknown sample A started to sweat at 112˚ and melted at 122˚. After mixing the unknown sample with Benzoic Acid it started to sweat at 115˚ and it melted at 122˚. The unknown sample, Benzoic Acid, and Acetanillinde were mixed and the mixture started sweating at 100˚ and melted at 119˚. According to the chart that was given, the melting point of Benzoic Acid is reported to be 121-122˚ and Acetanillide’s melting point is known to be 114˚. Due to the fact that sample A and Benzoic acid had the same melting points and the mixture of the melting points had a broader melting range and a lower melting point, the sample was determined to be Benzoic Acid.
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